Writes that an unidentified network. Wi-Fi network without internet access. We solve the problem using the example of a TP-Link router. Internet access is available, but the error persists

Often, many users of personal computers may have a problem with the correct definition of a network connection. In this case, the device will notify the owner of any problems. There can be 2 notifications: a red cross on the Windows network icon (if there is no link to the device) and an exclamation mark (unrecognized Windows network without Internet access). This article explains why the issues with the second alert option occur and how to fix them.

ISP side problems

If you did not change the system settings or the Wi-Fi router, did not replace the motherboard and network card, did not reinstall Windows, it is unlikely that any problems could arise on your side.

It may well be that everything is fine with your computer and router, the network is up and running correctly, but the provider is not currently providing you with the Internet.

Firstly, perhaps you simply did not pay for the service - in this case, the notification “unidentified network without access to the Internet” also appears. Try to contact the technical support of the provider and ask if the service is suspended, and also if planned or unscheduled maintenance is currently being carried out.
Perhaps there is an easy way to solve the problem and the operator will tell you about it. Otherwise, he will be able to leave a request to check the integrity of your line.

Getting an IP address

Another reason for the “unidentified network without Internet access” error is conflicts when obtaining an IP address. It is often found on new Windows operating systems or appears after reconfiguring a home router.

Consider the main possible reasons why this may be so:

• Wi-Fi Router distributes dynamic IP addresses, and a static one is installed on the computer.
• There is no DHCP server on the router, so it cannot allocate a dynamic address to the computer, and this type of receipt is specified in the system.
• There are security systems on the server or router and they block your IP as unverified. This is a common occurrence when connecting via Wi-Fi in large companies and offices. In this case, you need to contact your system administrator.
• The IP selected in Windows is the same as another one already on the network, or outside the area supported by the router.

Windows network settings

To resolve network conflicts, you will need to go to the Windows settings. To do this, follow the instructions provided:

Depending on the settings of your Wi-Fi router, you will either need to check the boxes next to “Obtain an IP automatically” and “Obtain DNS automatically”, or register the correct static addresses.
For most routers, the following settings will work:

• IP - "192.168.0.*" or "192.168.1.*", where "*" is any number from 2 to 254.
• The mask is "255.255.255.0".
• The default gateway is the address of your Wi-Fi router. It can be found on the label glued to the body of the device. Usually this is "192.168.1.1" or "192.168.0.1".
• DNS - you also need to enter your router in this field.
• Alternative DNS - you can leave it blank or enter the popular DNS server from Google - "8.8.8.8".

After that, return to the properties of the local network and click on the "Disable" button. After that, in "Adapter Options", double-click on the Internet icon to turn it back on. You can also disconnect and connect the patch cord that goes to the computer.

DHCP server problems

If your router distributes addresses via Wi-Fi or a wired connection automatically, there may be some problem with the DHCP server. In this case, resetting and updating the server configuration will help. To do this, open the Windows console in administrator mode and enter 2 commands in turn: "ipconfig / release" and "ipconfig / renew".

Sometimes there may be no Internet connection and a message is displayed in the tray: "Unidentified network without access to the Internet." The problem can occur for various reasons. The article below details what you need to do to fix such problems.

Very often, this happens when the PC owner configures access to the Network or Wi-Fi router, and everything is reset. The Internet service provider or personal computer is blamed for what happened, for example, when the Windows system is reinstalled.

It looks like this. There is no Internet connection, sites do not load normally. In the lower right corner, near the time, a yellow icon is displayed, and inside it there is an exclamation mark. By clicking on the icon, the text of the message will appear. When access to the Network is configured through a router, the text of the message will be slightly different: "No Internet connection, protected."

Note! There are many reasons for this problem. And not every one of them can be eliminated easily and in a few minutes, but it's worth a try.

Reasons for the message

To understand the origin of such a problem, you need to check and find out if other devices can work through the router. If the home network on another PC is functioning properly, then it's not the provider. If not, then there are two possible scenarios:

• there is an alert "Without access to the Internet", an unidentified network is not in the list of connections;
• the alert is displayed in full.

Note! The first option indicates that the problem arose due to the Internet service provider, the second indicates problems with the router.

If the problem is caused internally, you can try the following:

• Reboot the device that is giving such an alert. This should be just a restart, and not completely shutting down and turning on the device again.
• The router needs to be rebooted if it is used to search for a network. To do this, it is recommended to disconnect it from the network, wait about 10 seconds, then reconnect it.
• The device may stop connecting to the network after manipulations such as updating the system, resetting and reinstalling with saving data, setting up a new antivirus program downloaded from an unknown source have been carried out. Then you can try turning it off for a while. The same situation can occur when using third-party VPN programs. But then you will need to remove them for a while to check if this is the reason.

Below is information about the reasons for the appearance of an unidentified network without access to the Internet Win 7 and what to do with problems. But it will be difficult for a beginner to correct situations without having additional information and skills, but you can try.

Troubleshooting when connecting directly

There are several options for what to do with the error "Unidentified network without access to the Internet" for Windows 7.

Invalid IPv4 protocol values

In this case, the system type does not get the network address because it is incorrect.

Note! As a rule, this is accompanied by a suspiciously long identification time during the next connection to the Internet. At the same time, the owner of the PC could not change the data in the settings of his device. Malware can restrict access to the Web.

To get things right, you need:

1. Go to the "Control Panel" section, then to the "Network and Sharing Center" item, where to find the "Change adapter settings" button and click on it.
2. Then you should find among the proposed connections "Unidentified network" and click the mouse. Select "Properties" from the drop-down menu.
3. There, click on the "Internet Protocol version 4 TCP / IPv4" section, where just below click on the "Properties" menu.
4. It remains to check the status of obtaining an automatic IP and DNS server address (but only if the network is not corporate), it should be active. Or analyze the correctness configurations if the connection is made through a router and the provider requires you to specify them.

Note! You can also try manually setting other settings. For example, change the IP type by changing the last digit. But at the same time, numbers close to one are not recommended. It is important to enter the address of the router in the field of the main gateway, specify the Google DNS addresses with the addresses of the DNS servers. The preferred DNS server is 8.8.8.8, the alternate is 8.8.4.4. It is also advisable to clear the DNS cache.

When something changes, you will need to click on "Save". If this was the cause of the problem, Internet access should resume.

Problem in TCP/IP

A problem in TCP/IP means that there is a software flaw in the Internet Protocol. To eliminate them, you can reset the TCP/IP settings.

For this you should:

1. Open command prompt as administrator. To carry out these actions, select the "Start" button, enter "Command Prompt" in the search bar, right-click on it and select "Run as administrator".
2. Enter the text there: netsh int ip reset resetlog.txt and press the Enter key.

There is another way - to enter the commands below in sequence:

• netsh int ip reset;
• Ipconfig /release;
• ipconfig /renew.

Cause in DHCP

The Internet may be lost for this reason when the Internet connection cable is used for the first time. This is due to the fact that the PC cannot obtain a network address.

Note! To solve this problem, you need to set the Network Address for the network adapter you are using.

1. Open the "Network adapters" folder, select the "Properties" tab of the Wi-Fi network adapter or card that is usually used by clicking on its icon with the mouse.
2. Select the "Advanced" tab.
3. Find the "Network Address" (it can be represented as a Network Address), where you should specify a 12-bit number. In this case, you can use any numbers and letters of the English alphabet from A to F.
4. Confirm changes by clicking OK.
5. Restart your computer for the changes to take effect.

At the end, it remains to register on the command line:

• Ipconfig /release;
• ipconfig /renew.

Solutionproblems connecting through a router

The three most common causes of a problem with a network configured through a router.

Provider's fault

Perhaps, most often, an unidentified network appears precisely because of the incorrect operation of the provider. In this case, the user usually did nothing the day before: the settings did not change, the drivers were not updated, Windows was not reinstalled. Five minutes ago everything worked and suddenly stopped.

Note! There is only one solution to the problem - to wait for everything to work itself out. But it is important to make sure that the failure is on the provider's side.

For this you should:

• call the hotline of the provider;
• try connecting another computer, laptop or netbook to the cable. If the provider is to blame, then the network will not work on any of the devices.

When the LAN Ethernet connection is configured incorrectly

In this case, you need:

1. Visit the "Control Panel" section by clicking "Start".
2. Find "Network and Sharing Center".
3. Then click "Change adapter settings".
4. Select the desired LAN connection and open the "Properties" tab.
5. In the menu that appears on the screen, select "Internet Protocol Version 4 TCP/IPv4".

What exactly needs to be changed there was discussed above in the section “Incorrect IPv4 protocol settings”.

Flew drivers for the network card

It often happens that an unidentified network appears after reinstalling Windows. In particular, this applies to laptops. At the same time, the device manager displays information that all the necessary drivers have already been installed, but there is still no access to the Internet. Then you need to download the drivers from the official source - the website of the company that manufactured the laptop or motherboard, or the company's network or wireless adapter.

Important! These drivers need to be installed manually, although the Device Manager shows that they do not need to be updated.

Thus, the reasons for the appearance of a message about an unidentified network without access to the Internet, as well as ways to eliminate them, may be different. One of them should definitely help. The main thing is to carefully understand everything.

There are several reasons why there is Wi-FI without access to the Internet. Often problems lie in routers and access points, but there are also cases when services installed in the operating system are to blame for the malfunction.

How to recognize the cause of the problem, read on.

Determining the problem

First you need to find out at what stage of the connection the problem arose. In order to make sure that the problem is with the router settings, you must try to connect to the Wi-FI network through another Windows laptop or smartphone.

If the error disappears and the Internet connection is present on another device, the user will find out that it is necessary to configure the Wi-FI adapter in the laptop itself.

In the event that access to the network was not obtained from any device, it will be necessary to look for problems in the router, access point, modem or Internet provider.

It is also worth trying to connect the network using a network cable, bypassing routers. This will allow you to identify problems more specifically.

If there is access to the Internet via cable, then it is worth changing the settings of the router or access point itself, if not, the problem is in the modem (if any) or provider.

Disabling network access on the provider side

Sometimes, for reasons of malfunction or maintenance, a yellow triangle can be observed, which notifies the user of a limited Internet connection.

In the case when the equipment settings were not performed, but access, nevertheless, was lost, most likely the problem is on the provider's side.

In this case, you need to find the company's phone number, which is usually recorded in the contract, and, by calling, inquire about the causes of the malfunction.

Advice! But do not immediately rush to dial the operator of your provider, first reboot the router, since technical support will offer to do this in the first place.

If the resource is loaded and access to your personal account is obtained, this will mean that the Internet connection is limited by the provider intentionally, possibly for non-payment.

In the event that the site does not work, it is worth going to a call to the technical support operator.

Operating system settings

If access points are visible in the system on a laptop, you will not need to reinstall the driver.

When the Wi-Fi adapter is successfully connected to the network, but there is a yellow triangle in the system tray, indicating a limited Internet connection, you need to disable the antivirus and Windows firewall, which, if configured incorrectly or if they fail to work, can cause a similar problem.

The best option for checking the health of the Internet is to boot the system on a laptop in safe mode with support for network drivers.

To do this, you need to go to the system settings by pressing the key combination in Windows "Win + R" and run the msconfig request.

This will open the System Configuration window. In it, you need to go to the "boot" tab, where you need to mark "safe mode" with the "network" parameter.

If with this option you have access to the Internet, you need to start the laptop in normal mode, removing the previously set parameters, and then turn off applications that affect the network one by one. Most likely, these may be recently installed or updated programs.

You also need to scan your computer for viruses. The best option for this is Dr.WebCureIt! For Windows, since it does not require installation, it is free and always contains an up-to-date database.

Setting up a router

If Internet access is not available on several devices, the problem is in the settings of the router, which distributes the connection incorrectly. It can occur when resetting the settings for the current provider.

To restore them, you will need to open the description for setting up on the website of the company that provides the Internet. Also, all the necessary parameters for entering into the router are often attached to the contract concluded when connecting services.

In the event that the router was purchased independently of the provider, the instructions for it, most likely, will not be present on the site. It will need to be found on the resource of the equipment manufacturer. Also, the documentation is always present in the box with the router.

The sequence of actions for making settings on the D-Link DIR-600 router:

• open the parameters by entering its IP into the address bar of a Windows browser or other OS;

• enter your username and password (the default value is admin);
• in the wireless network wizard, configure the name and password of the Wi-FI connection;

WiFi network name

• by going to the tab in the lower horizontal menu "Advanced settings", click on the WAN item, located in the network section;
• if there is a connection profile, double-click on it to make settings; if it is missing, add a new one.

• in the window that opens, make and save the settings that are specified on the manufacturer's website.

Also, for this router model, a simpler configuration option is available by clicking the Click’n’Connect item in the main menu. However, it may not work correctly with some providers.

Access restriction on public routers

Coming to some coffee shops and connecting your laptop to Wi-FI, you should not run programs for downloading torrents, as the network automatically turns off and is no longer restored even after the router is rebooted, but access will be reopened only after a day.

This restriction is set so that visitors do not overload and without it not too high-quality access to the Internet.

The installed traffic filtering system adds the mac-address of your Wi-Fi network adapter on the laptop to the blacklist for some time. But there is still a solution to this problem.

Since we do not have access to the coffee shop equipment, the only option left is to replace the mac-address on our equipment.

Change mac-addresses Windows

On most hardware with the Microsoft Windows operating system, the best option for changing the Mac address is to edit the registry. Despite the visual complexity, it will not take much time.

Creating a New Registry Value

• create a string parameter in this folder with the name NetworkAddress;
• by double-clicking on it, add the value of the new mac-address, represented by 12 hexadecimal digits (for example, "406186E53DE1");
• restart Windows to apply the settings.

After that, the adapter will no longer be blacklisted, and therefore, it will be possible to successfully connect to the Internet.
conclusions

There are many problems and solutions for them. Finding out exactly which equipment failed to work, it will be possible to find the best way to fix the problem.

It occurs, as a rule, when you change your home modem or move to a new place of residence. As they often say in such cases, everything seemed to work and nothing changed. Nevertheless, there are some nuances here.

Now we will talk about only one of the most common causes of this problem and only one simple solution. After all, this is how the author has always managed to access the Internet.

So let's start from the beginning. And the first thing we will consider is Wi-Fi. If, when connecting to a modem in this way, you receive the following message in the "Network and Sharing Center":

So, the first step is to do one simple operation. Further, all settings will be shown using the example of Windows 10, but in older systems everything is done by analogy. The main thing is to understand the general essence.

Right-click on "Start" and select "Network Connections":

Then you need to select the wireless network adapter, and right-click on it again. In the menu that opens, select the line "Properties":

In the next step, we follow the path "IP version 4-Properties":

And we check that the option "Obtain an IP address automatically" is activated in all points:

After that, in theory, the annoying message "Unidentified network without access to the Internet" should disappear. So let's check if this is really the case. After all, you can only trust your own eyes.

To do this, click on the wireless connection icon in the system tray and select "Network and Sharing Center":

And here, please, there is no trace of the hateful message:

Now you can safely use the network with the Internet. By the way, the settings of the IP addresses of the network card can also be changed through the "Change adapter settings" item. Remember this point, as we will return to it later.

Okay, but let's now talk about a situation where the situation has not changed after the above settings. In this case, it can be assumed that your home modem simply has the DHCP server function disabled.

After all, it is she who is responsible for the automatic distribution of IP addresses to devices connecting to it. And here it must be said that setting it up for each router model will be individual.

On the example of the article, this case looks like this:

So, ladies and gentlemen, enable this option for yourself and you will be happy. And now let's move on to setting up a wired network card. How to configure it correctly in case of lack of access to the Internet?

The most interesting thing is that in this case, you need to act the other way around. That is, the values ​​of IP addresses must be set manually. This is done in the following way. Select the wired network adapter and go to its properties:

The Internet is an integral part of our life. The lack of a network is a serious problem for the user. There is not always time to call the provider, but, fortunately, you can troubleshoot yourself. Below you will read about common causes of Internet problems and how to fix them.

Possible reasons for the lack of Internet on Windows 7

There are several reasons for not having internet. Some of them relate to computer drivers and its equipment, others affect system errors and the lack of correct network settings.

The most common reasons for the lack of Internet:

• mechanical damage to the cable or ports;
• lack of a network card or its drivers;
• incorrect connection settings on the computer or router;
• presence of virus software.

The Internet may also be unavailable due to debt on the personal account or due to a line failure. Before you try to troubleshoot, check if they are caused by these factors.

How to check network status

Among the problems with the Internet, one can single out those that occur most often and periodically occur for most users. Resolving them is very easy. The first thing to do is check the status of the network.

You can do this in two ways:

In both cases, under the icon of your network, its status will be described.

Unidentified network without internet access

If the computer "sees" the network and connects to it, but does not get access to the Internet, the network status will be called: "Unidentified network. No internet access." What to do in this case?

The computer "sees" the network and connects to it, but does not access the Internet

Rebooting the router

If you have a router installed, the first thing to do is to reboot it. He may simply not have time to update the data, and because of this, access to the network will be lost. Reboot is performed in the following order:

1. First, the router is disconnected from the network. It is important to unplug the cord from the outlet, and not to reboot using the button on the equipment - you need to stop the flow of electricity for a while.
2. Then, for 10-15 seconds, the router must be left turned off.
3. After that, the router is connected back to the network and wait until the indicators on it light up.

After the indication on the router has appeared, you can check whether access to the Internet has appeared. Usually, after a reboot, the Internet appears within 7–10 seconds.

Checking network settings

Network settings are data that allow a computer to connect to a network distributed by an ISP. These settings are issued by the company that provides access to the Internet (usually they are specified in the contract for the provision of services). Sometimes the settings on the computer get lost, and because of this, the device cannot connect to the Internet.

In order to check the network settings, you need to open the "Protocol Properties". You can do it like this:

1. Go to the "Control Panel" through the "Start" menu.
   "Control Panel" is located in the right menu "Start"
2. Select "Network and Internet".
   In order to find the desired section, you should select the "Category" view option in the upper right corner of the screen
3. Open the "Network and Sharing Center" section.
   In the "Network Control Center" you can check the connection status, create a new network, carry out almost any action with your Internet connection
4. On the left, find the "Change adapter settings" section.
   Locate the "Change adapter settings" section
5. In the list of networks, select the one you need, right-click on it and find the "Properties" item. Only an administrator can open Properties.
   The desired network will be called "Local Area Connection" or "Ethernet"
6. In the list, find the item "Internet Protocol version 4", select it with a single click of the left mouse button. After that, the "Properties" button under the list is activated, you need to click on it.
   An item is selected by a single left-click of the mouse. You do not need to uncheck the box next to the item

When the window is open, you still need to understand what settings should be entered. There are three options:

We will understand what IPoE and PPPoE protocols are, but we will not go into terminology. It is enough to understand what protocol is used on your communication line. To do this, just look at the network settings issued by the provider (specified in the contract).

Settings can be as follows:

• password and login are used on the PPPoE protocol,
• IP address, subnet mask, gateway and DNS are used on IPoE.

If PPPoE is used and you are connected directly, that is, you do not use a router, after checking the settings through the protocol properties, you need to recreate the network.

1. Return to "Network and Sharing Center".
   Thus, only PPPoE connection is configured. Protocol properties are used to set up a wired IPoE connection
2. Open the "Create and configure a new connection" item.
   Switching between items is done with a single click of the left mouse button.
3. Select "Create and configure a new network" and click "Next".
   The selected item will be highlighted with a bright blue background.
4. Click on the "High Speed" option.
   Waiting to search for available connections can take several minutes
5. If an error occurs, select "Create connection anyway".
   This error appears quite often, but the connection can still be created
6. Next, you will need to enter the network settings, as well as the network name - this is the name of the connection. You can use the name of the provider company or something else.
   The connection name is its name, and the username and password are the network settings. It's worth noting that the password has nothing to do with the Wi-Fi key.

After that, the network will be reconfigured, and you will need to check the availability of network access.

Video: Checking network settings on a computer

Reset TCP/IP settings

Sometimes internal system errors can be the cause of problems. TCP/IP is a set of network protocols responsible for data transfer. You can reset it like this:

Checking Drivers

The reason for the lack of access may be outdated drivers (usually this problem is associated with a recent update of the operating system). Let's check their status.

In addition, by right-clicking on the name of the driver, you can select "Uninstall", and then restart the computer. Then, when you turn on the system, it will automatically install the missing driver.

After uninstalling the drivers and rebooting the computer, the system will automatically install the appropriate drivers

If there is an exclamation mark next to the driver icon, you will need to completely reinstall the drivers and check the performance of the network card installed in the computer.

The default gateway is not available

Network Diagnostics will help you identify the following problem. Right-click on your connection icon, select Troubleshoot.

By right-clicking on the icon, you can also open the "Network Control Center"

If you receive a Gateway Unreachable message after system diagnostics, the following steps may help.

Prohibit turning off the AC adapter to save power

Sometimes the system disables the network adapter - the device that allows you to connect to the internet - to save power. Try to disable this option.

1. Find "Device Manager" through the search bar in the "Start" menu.
   Opening the "Device Manager" through the search is not the only way, but the most convenient
2. Expand the "Network adapters" tab, select the one you need, right-click on it.
   In the context menu, click on "Properties"
3. Select "Properties" and open the "Power Management" tab.
   Changing these settings will also help solve the problem of disconnecting the Internet after the computer goes to sleep
4. Uncheck the box next to "Allow the computer to turn off this device to save power" and save the data.
   After changing the settings, do not forget to save them by clicking on the "OK" button.

Update or reinstall drivers

Also, through the "Device Manager" you can update the drivers: expand the "Network adapters" tab, right-click on the network driver and select "Update" or "Uninstall", then restart the computer.

If the action does not help, you can download the drivers from the websites of their manufacturers and install them yourself. Manufacturers usually offer to download drivers in the ".exe" file format, so for installation you only need to run the downloaded file and accept the agreement.

Video: how to reinstall drivers yourself

Error 651 occurs when connecting to the Internet through a router

This error occurs when trying to connect via PPPoE. Rarely, but it happens that users create a new high-speed connection while the provider uses the IPoE protocol. Therefore, first of all, make sure that you are using the PPPoE protocol.

After that, you will need to re-create the connection. The process is described in detail in the "Checking network settings" section (all you need to do is create a new connection through the "Network Control Center"). If that doesn't help, read on.

Disable antivirus

Sometimes antivirus programs block access to the Internet. Often the solution to the problem can be disabling the antivirus. Right-click on its icon in the Control Panel and select Disable. Sometimes antiviruses block access to the network even in a "sleep" state, so you can try not only to disable, but also completely remove this software. If this action helps, please report the situation to your antivirus technical support.

Problems on the router

The cause of the problems can be several problems associated with the router:

• incorrectly connected cable;
• incorrectly entered settings.

First try doing the following:

1. Disconnect the router from the network.
2. Without connecting the router, unplug the network cable from it and plug it back into the WAN / INTERNET port, making sure that the plastic clip on the plug clicks when connected.
3. If the cable goes from the router to the computer, disconnect it from the LAN connector on the router itself and from the network card connector on the computer, and then plug it back in.
4. Connect the router to the network.

If access does not appear, check the network settings entered on the router. In order to access the router, you will need to enter "192.168.1.1" or "192.168.0.1" in any browser (in the address bar). Sometimes the address at which you can log into the router is different, so if you cannot log in through the specified addresses, check the data in the instructions.

Internet files not downloading

It may also happen that Internet access is active, but files are not downloaded. This problem is usually associated not with the Internet itself, but with a computer, software.

What you can try to do:

• try to download a file from another source - you may not be able to download something simply because the resource does not support downloading;
• try downloading through other browsers;
• check your computer for malware using any official antivirus.

Internet media not working

It happens that the Internet works, but video or audio materials are not played. What to do in this case? First, check if the files downloaded to the computer can be played. Perhaps the cause of the problem lies directly in the sound settings of the computer. If files are played from a computer, but not from the Internet, read on.

The first thing to do is to understand why this problem occurs. It may be a browser error, the absence of plugins. To get your computer up and running, do the following:

PPPoE Diagnostics

Additionally, in order to find out the causes of errors when using PPPoE, you can use the "Troubleshooting Center". Then the system will independently check for errors and offer possible solutions.

PPPoE (Point-to-Point Protocol over Ethernet) is a communication protocol over an Ethernet network that works on a point-to-point basis and gives the user a number of options: encryption, authentication and data compression. It is necessary for the user authorization system, which makes it easier to track the time of provision and payment of network services.

Right-click on the network connection icon and click the Troubleshoot button. After that, an analysis will be made, Windows will try to cope with the difficulties on its own, after which it will prompt you to perform several actions.

Error 619

Restart your computer and disable all security systems: antiviruses and Windows Firewall. The latter is disabled in the following way:

Error 633

There is only one solution:

1. Restart your computer.
2. Try to connect to the internet again.
3. Create a new connection.

Error 638

The main causes of occurrence:

• damage to the network cable;
• malfunction of drivers or network card;
• incorrect connection settings;
• problems with network equipment (router);
• the presence of viruses on the computer.

First of all, do two things: check the integrity of the cable and the presence of an indication on the router. Never neglect these steps in case of problems with the Internet, so as not to waste time trying to solve the problem caused by mechanical damage.

It is clear that if the cable is damaged, you need to call the provider. But if there is no indication on the router (which indicates that the device is de-energized), you should try to reconnect the router to another outlet before replacing it.

After checking the functionality of the router and the integrity of the cable, check the computer for viruses with any antivirus program.

If the above does not help, re-create the network connection - check the correctness of the entered settings both on the router through its settings, and on the computer itself through the protocol properties. Both actions are described in detail in the previous paragraphs of the article.

Error 691

The only reason for the occurrence of error 691 is the incorrectly entered password and login (network settings). Therefore, the first thing you need to do is re-create the connection. The process has already been described earlier - you need to go to the "Network Control Center", select "Create a new connection" and then enter the correct network settings. After that, restart your computer and check your internet connection.

If the action does not help, report the problem to the provider. Perhaps there was an accident on the line, which caused the error.

Error 720

The easiest way to solve this problem is to reinstall the operating system. To do this, just download the operating system file from the Windows website to a disk (or purchase a disk in a store) and run it on your computer.

You can also try updating the TCP/IP protocol. The action is described above, but you can perform a deeper operation by completely reinstalling the stack. Reinstalling the stack on your own is dangerous - you will have to work with system files, and their damage will affect the operation of the computer. Therefore, just try to update the stack, and if the action does not help, contact the provider or a professional wizard for help.

Video: PPPoE Connection Errors and Troubleshooting

Network cable not connected

If you see a message when checking the connection status that the network cable is not connected, the first thing to do is really check that it is connected correctly and that there is no damage. If possible, try using a different network cable.

Make sure the cable is connected correctly. On the router, the network cable must be connected to the WAN or INTERNET port, and the cable leading from the router to the computer must be connected to the LAN connector. There is usually only one port on a computer, so it will be difficult to make a mistake.

The WAN or INTERNET port is used to connect a network cable to the router, and the LAN ports are used to run cables to computers

Next, check the status of the router (if any). Its indicators should light up as usual. If there is no indication, reconnect the router to another outlet, try resetting the settings on the router (using the "Reset" or "Reset" button) and re-entering them. You should reset the settings only if you are sure that you can configure the router yourself.

Also check the status of your network adapter drivers and try updating them.

Video: checking the port on the network card and the WAN port on the router

Additional check of security settings

Security settings can also be blamed for many of these problems. This applies to the case when the PPPoE protocol is used. Therefore, if the proposed operations do not help to solve your case, try checking the connection security settings.

1. Open the "Network Connections" section.
2. Right click on your connection.
3. Open the "Security" section and set the use of "Insecure password" in the list that opens.

These are the main methods for diagnosing connectivity on Windows 7 and troubleshooting. Do not forget that the reason for the absence of the Internet can be a banal debt or an accident on the line. If the methods described above did not help you, contact the provider so that the technical staff can diagnose and solve the problem on their part.