Internet is not working on the computer. The Internet on the computer disappeared and wifi works. Network without access to the Internet and ways to solve the problem. The essence of the problem with web surfing

10.04.2020

It happens that browsers, and all at once, start to crash and not display web pages. The situation is very unfortunate, especially if your work is on the Internet, searching and processing information. And for simple recreation - a browser game or watching a series - it's unpleasant when the browser does not work properly. However, the problem can be solved almost always, whether it is a debt to the provider or the work of viruses.

Internet health check

The first thing to do when the browser stops displaying web pages correctly is to try other browsers and sites. It is quite possible that one specific resource or program has stopped working, in which case it will be necessary to “repair” the browser or check access to the site through a VPN connection (perhaps access was blocked, or maybe the resource simply closed).

But if other browsers give similar errors when trying to connect to different sites, the reason is a little deeper, the next step in diagnosing should be to check the Internet connection.

The first step is to pay attention to the network icon in the lower right corner. If you are connected via Wi-Fi, these will be several arcuate lines, and when connected via an Ethernet controller, a small rectangle with a schematically depicted plug. When a yellow triangle with an exclamation point is attached to this icon, it means that you do not have access to the Internet (possible reasons: debt to the provider, network problems, engineering works on the highway). In this case, you need to contact the technical support of the provider to clarify the reasons.

If there is no Internet connection, the corresponding icons will be displayed in the system tray

Well, if everything is in order with the network icon, messengers like Skype work, and maybe other programs: DropBox, OneNote, OneDrive (any applications that need access to the network, but browser protocols are not necessary) and they connect to the Internet, then we are faced with a more serious problem and we will have to solve it progressively, sorting through possible options.

Command Line Solutions

The command line (CS) is a powerful tool for managing the operating system and built-in components. Through the terminal, you can run such utilities and applications that many users have not even heard of. In particular, there are several commands that help reset network settings or clear route lists. This may well solve the problem that browsers cannot access the site and do not receive information from it in response.

Clearing the route list

Routing is a process in which the routes of the network are written, namely: the network address, the address of all nodes, as well as the metric (price) of the route. The Internet works on the principle of a short path connection, that is, sending packets and requests through the nearest nodes. But sometimes these nodes stop working for some reason, and the browser still sends requests through them to nowhere. Therefore, if a situation arises when browsers do not accept data, you can try to clear the route cache, for which the command line is used:

Reset TCP/IP settings

TCP/IP is a network model for transferring digital data. The model describes how data is transmitted from the source of information to the recipient. The model assumes that information passes through four levels, each of which is described by a rule (transmission protocol). The sets of rules that solve the problem of data transfer make up the stack of data transfer protocols on which the Internet is based. The name TCP/IP comes from the two most important protocols of the family - Transmission Control Protocol (TCP) and Internet Protocol (IP), which were first developed and described in this standard. Also occasionally referred to as the DOD (Department of Defense) model due to its historical origins in the 1970s ARPANET (operated by DARPA, US Department of Defense).

Wikipedia
https://ru.wikipedia.org/wiki/TCP/IP

To simplify the terminology of Wikipedia, TCP / IP are the rules and protocols by which data is transmitted between the server and the user. But as you know, rules are there to be broken. Only in the case of protocols, changing any settings (by the user, viruses or programs) can lead to the inability to access the Network from your PC. Therefore, using the command line, you can try to reset the TCP / IP settings to the factory settings:

Problems with the DNS service

DNS is the system that is responsible for linking an IP address and a website's domain name. DNS servers are responsible for the operation of the system, as well as a special windows service. Sometimes it is necessary to clear the cache of addresses and domains for the correct operation of the address system. To do this, you need to use the command console again:

It also happens that the server itself, which the provider uses by default, does not work correctly on a temporary or permanent basis, therefore it is better to set a stable DNS in the connection settings.

In order to find necessary settings networks and not to wander along the paths of directories, you can use the quick transition: in the address bar of the explorer, write "Control Panel\Network and Internet\Network and Sharing Center" and press Enter.

Through the address "Control Panel\Network and Internet\Network and Sharing Center" we get into the network management environment

We click on the connection icon, then in the status window open "Properties".
Open the network status window and click on the "Properties" button in it
In the components dialog box, select "IP versions 4" and open "Properties" again.
In the components window, select the "IP version 4" item and click on the "Properties" button
We rearrange the toggle switch to "Use the following DNS addresses" and prescribe the values:
Save the changes in all windows with the OK button.

Video: How to clear the DNS cache

Cleaning up the hosts file

It is possible to block sites through the hosts file, it contains a database of domain names and is of higher priority than the DNS server when accessing the site. If strange events occur when you try to connect to some sites, you should check this text file:

Correction of the consequences of the work of viruses

Viruses can also interfere with the operation of the Internet connection, it is because of them that the hosts file changes. Therefore, if you fixed it, and then the problem reappears, this is a sure sign of malware. And before making changes to hosts again, you need to clean your computer from viruses.

It is necessary to carry out a deep diagnosis of the file system with two or three anti-virus programs, for example, the standard "Defender" and one or two other utilities:

Disabling firewall access blocking

Sometimes the reverse situation occurs: the connection to the network is blocked by a firewall. This happens especially often when connecting to public place via Wi-Fi, but there are exceptions in the form of home networks. To regain access to world wide web, you need to configure the firewall accordingly:

Open the search, enter "Firewall" and select the best match.
We rearrange the toggle switches to the "Disable" position and save the changes
We restart the computer and again we will work with the sites.

Video: how to turn off the firewall

Checking the Windows Registry

To solve the problem through editing the registry, you need to fix the setting in two folders:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Windows\;
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Windows\.

The parameter is named AppInit_DLLs, its value must be changed to empty:

Fixing the situation when web pages do not open in the browser is very simple. You need to make sure that the problem is not in the Internet connection and continue to follow the instructions provided above, this will return the browsers to full functionality.

If you can't open websites in your browser on your Windows PC, use the tips in this article to help you fix this problem. The problem can manifest itself in different ways: all sites or only some may not open in the browser, the problem may appear only in one browser or in all. At the same time, other programs (for example, Skype or other instant messengers) work fine and the Internet is connected. In any case, it most likely manifests itself that when you try to open the site, the page takes a long time to load and then the “Page is not available” error appears (ERR_ TIMED_OUT, ERR_CONNECTION_ CLOSED, WEB Page Inaccessible). It all depends on the browser, and the reason for not accessing the site.

AT Google Chrome the error might look like this Can't connect to the internet”.
AT Mozilla Firefox — “Server not found. Firefox can't find server www.sitename.ru“
In Internet Explorer - " Can't display this page”.

We list typical problems due to which some sites may not open on your computer:

Problem with DNS servers or records;
Incorrect network settings TCP / IP protocol on a computer;
Incorrect entries in the hosts file;
Your computer may be infected with a virus;
Incorrectly configured browser or plugins;
Error in the routing table;
Invalid MTU size.

Problem with DNS server or DNS records

A common reason why websites may not open is an incorrectly configured DNS server or incorrect DNS records. Try to manually specify the addresses of Google's public DNS servers (8.8.8.8 and 8.8.8.4) as the primary DNS server. Open Control Panel - Network and Sharing Center -> Change adapter settings -> Select the properties of the network adapter through which you are connected to the Internet -> Select IP version 4 (TCP / IPv4) -> in the Preferred DNS server section, specify 8.8.8.8 . Save your changes.

Also flush the DNS cache with the command:

ipconfig /flushdns

Configuring IP for Windows

The DNS resolver cache was successfully cleared.

Reset TCP/IP protocol settings

Open a command prompt with administrator rights and run the command:

Winsock directory reset succeeded.

Restart your computer and try to open sites that you did not open.

Checking the hosts file

Some viruses make changes to the hosts file in order to redirect traffic to fake sites. Check if there are any extra entries in the hosts file (by default, there are no static mappings between DNS names and IP addresses in the hosts files).

Run the command:

Notepad C:\Windows\System32\drivers\etc\hosts

If you see some third-party site addresses there that you cannot open, then you need to delete them and save the file.

Checking your computer with antivirus

Scan your computer with a portable antivirus (Kaspersky Security Scan, Dr.Web CureIt, Microsoft Safety Scanner or Avira PC Cleaner).

Browser Issues

Check the proxy server settings in the browser (if you are connected to the Internet directly, most likely you need to disable the use of a proxy server in the browser settings), disable unnecessary plugins and extensions. Try installing another browser (for example, if you have Chrome installed, install Firefox).

Check the system for loadable modules. Open the registry editor and go to the HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Windows branch. Look for the Applnit_DLLs setting. Its value should be empty if it contains files - manually remove these files from the disk and clean the registry setting.

Clearing the routing table

Some viruses can statically add entries to the routing table. You can reset all static routes in the routing table (except for the default routes) with the command:

After executing the command, restart your computer and try to open the site.

Checking the value of the MTU parameter

Parameter MTU(Maximum Transmission Unit; maximum transmission unit) means the maximum packet size that can be transmitted over the network without fragmentation. If you use the wrong MTU size, you may experience problems with opening some sites in browsers, malfunctions of VoIP telephony, a problem with receiving or transmitting files over the network.

Check present value MTU in Windows and in the router settings. Check the maximum MTU size with your ISP. Most likely you are using the MTU value of 1500, try changing it to 1460, or 1420. For a 3G/4G USB modem, it is better to set the MTU value to 1476.

You can check the current MTU size in Windows using the command

netsh interface ipv4 show subinterfaces

In my example, on all interfaces, the MTU size is 1500.

Access to the site is blocked by an antivirus or firewall

Also, very often antiviruses and firewalls block sites that are in their database of malicious sites. In this case, the browser will indicate that the address is blocked by antivirus. If you still want to visit the site, then you need to disable the antivirus, or add the address to the exceptions. It's not always safe. Browsers themselves can also block malicious sites.

Website SSL certificate problem

In some cases, connecting to an HTTPS site may be blocked by the system or browser due to the presence of an incorrect, untrusted or expired SSL certificate. Try updating the root certificates on your computer or adding the site's certificate to trusted (not secure).

Let's analyze the problem situation when the phone connects to Wi-Fi, but there is no Internet. It looks like this: next to the name wireless network writes "Connected", but when you try to open any site in the browser, an error is generated Web-page is unavailable or 404 Not found. Chrome still writes in such cases. The same goes for other software - all sorts of programs that use the Internet connection for their work, or at least check for updates on startup, will also give an error connecting to their web server.

In this article, we will detail how to solve the Internet problem on your computer, phone or tablet. Read carefully, follow all the steps and you will definitely find the reason why you do not have an Internet connection with a working Wi-Fi connection.

Collection of information about the problem

Before making any changes to the settings WiFi router, computer or phone, check the following points. This can make it easier to find the reason for the lack of Internet or narrow down the search:

Is the Internet paid for and are the funds on the account running out?
Is there access to the Internet by wire from a desktop computer?
Is it possible to access the Internet via Wi-Fi from other devices that use the same Wi-Fi router?
whether the problem with the Internet connection remains when connected to another WiFi networks?

Depending on the answers to these questions, it may already become more or less clear to you what the problem is most likely. For example:

if there is no Internet at all - neither by wire nor by Wi-Fi, then the reason may be either blocking access on the provider's side or a malfunction of the router. Next, we check with the provider whether everything is in order with the line and the account, and then we check the performance of the router.
if the Internet is on the PC via a wire, but not on any device via Wi-Fi, then the problem most likely lies in the wireless network settings of the router. The same conclusion can be drawn if the Internet appears and works without problems as soon as you connect to another Wi-Fi network from the same device
and if it turns out that all devices are in order, and only one does not have an Internet connection, then the problem is obviously in this “client”.

Wi-Fi is connected, but the Internet is not working. What to do?

So, if your Wi-Fi is really “connected”, but there is no Internet (sites do not load, Skype and Viber do not connect, a yellow network icon is displayed on the laptop with the notification “No Internet access”), follow these steps to fix the problem. The steps are listed with a probability factor.

1. Restart your router

Sometimes the unexplainable happens failure on the router . Wherein the local network and Wi-Fi are working fine, but there is no Internet access. This can happen when the router is running for a very long time without reboots and when there are changes in the provider's network. Just in case: it is written how to reboot D-Link remotely.

2. Reboot the device where there is no Internet connection (phone, laptop)

Sometimes on a smartphone (tablet, laptop) a certain crash (glitch), which can cause a similar problem. Visually, everything seems to be fine, but there is no Internet for no apparent reason. In order to avoid such a failure, restart the device.

3. Reconnect to Wi-Fi network

This step is very important, despite its simplicity and boldness at first sight. You need to forget the Wi-Fi network, and then connect to it again by entering the password (security key). This may resolve the issue and restore your Internet connection, for example if network settings have been changed user or virus.

4. Set the correct date on your Android device

Wrong date may be the cause of the internet problem. In this case, sites will open, but Antivirus, Google Play Store, etc. may not work. .

5. Disable Proxy Server

If your computer or Android device the proxy server is turned on, there may also be a situation when Wi-Fi is connected, but there is no Internet. Usually this problem occurs on Android.

6. Check the Internet connection settings on the router

Go to the WAN or Internet settings on the router. (). Check to be specified correct connection settings , such as:

type of connection with the provider (see the contract or on the provider's website);
login and password, if required (see in the contract);
whether the MAC address is correct (check in the contract. If you reset the router, you may have to go to the ISP's office with a passport and contract and ask to register a new MAC address of the router's WAN port).

If your provider uses a PPTP connection, and the settings on your router have gone wrong and now IPoE (dynamic IP) is selected instead of PPTP, then naturally the router will not be able to connect to the Internet. In this case, the sites will not open on any device.

7. Change your wireless channel

Wireless equipment that is in the vicinity and operates on adjacent channels may create interference your router. Try changing the Wi-Fi channel.

And it would be even better to first check which channels are freer. This can be done using the Android app or InSSIDer for Windows.

8. Install WPA2-PSK + AES encryption for your Wi-Fi network

The WPA2-PSK encryption algorithm is the most secure. And AES encryption will provide high speed and security. Most devices, even not new ones, successfully work in WPA2-PSK mode with the AES algorithm.

Wi-Fi Connected But Internet Not Working: Other Causes of the Problem

Weak signal

If there is too much distance from the client device to the router, there may also be such a problem: the device received an IP address, but there is no Internet. Therefore, you first need to check if the Internet appears when approaching the router (if possible). Then - if the problem is precisely in the distance - somehow try to reduce it. If the router is yours, place it in the middle of the house.

Some organizations provide free Wi-Fi, but in order to be allowed on the Internet, you need to launch a browser, enter a password or go through some other authorization procedure. For example, specify a phone number and enter a code from SMS. It is better not to contact such networks and do not enter any information about yourself in order to avoid problems. It is much easier to find another access point without such nuances.

If you've done everything but still don't have an active Wi-Fi connection to the Internet, there's another option: set up a static IP address. This method is not a solution in the full sense of the word, but in some cases it helps to get around the problem and gain access to the Internet. To do this, on your smartphone, call the properties of connecting to a Wi-Fi network, check the box Show advanced options and select Static IP:

I hope this guide helped you identify and fix your Internet connection problem and now all your devices are online, both wired and wireless. Questions and additions to the article, please write in the comments.

It is rare that no one has encountered such a problem. It seems that everything should be in order: the phone is working, the SIM card is inserted, the contract with the provider is concluded - but there is no access to the Internet. And just about he was still there, and after a minute - as if it had not happened. A familiar situation, isn't it? If the Internet does not work on your phone, then do not despair and rush to service center break my head.

With very little effort, you can really cope with the problem and without someone else's help. the Internet on the phone is configured a little differently than on a regular personal computer, and this often causes difficulties for users. What interface elements are responsible for setting up the connection? What are the possible reasons for denial of network access? We will consider all these issues in our note. The most banal reasons get the least attention. And absolutely in vain. Here is a short list of them:

The Internet on the phone is disabled for non-payment. That is, you have a negative balance in your account.
The phone does not connect to the Internet because you are out of network coverage.
The data transfer option has failed.
In all other respects, a normally working mobile phone did not go through the automatic registration procedure.

The likelihood of the above is quite high. It is by checking these options and troubleshooting these problems that we will begin our fight with the disappeared network.

The simplest tests

First, we check the state of the balance. Each provider offers its own way. Read the instructions or rummage through the contact list - there is usually a corresponding number there. To get account information, type *, then a three-digit code (unique for each operator), followed by the # symbol and press the call button. In response, the display shows the value of the amount available for payment of calls. If the wallet is empty or there is a cash overrun, replenish the account and the Internet will appear.

We will assume that everything is “OK” with the balance. What to do next? Look at the network connection indicator. If it is disabled, it means that you are out of range. The only cure for this is to get out of this place.

All modern smartphone models have a special option. It's called Data Transfer. To get to this setting, do the following:

Go to the connection settings menu.
Click on "More".
Click on " Mobile network».
On the screen that opens, check the "Mobile data transfer" box. The figure below is a good illustration:

What to do if there is still no internet? You can try turning your smartphone off and on again. Sometimes it helps. The fact is that 3G networks often stop responding after leaving the subway and in other cases getting into the access zone from places where there is no network. In this scenario, the machine is unable to connect to the network without rebooting.

Restore settings automatically

It happens that the network settings of the device have been lost. Restoring them is easy and can be done in two different ways: get the settings from the operator or do the configuration manually. Of course, the first method is preferable. Just because it's easier. No need to bother yourself with all sorts of technical details. For some time now, this service has become available for every operator. mobile communications. To download the settings from the provider's server, you need to call a specific number or send an SMS to the number. For Beeline, this is a call to 06503, for MTS - SMS to 1234, Megafon receives SMS to 5049, and Tele2 is waiting for your call to 679.

In response, the operator will send a settings package to the phone, which will be automatically registered in operating system your phone - that is, you don’t have to do anything with “handles”. If you do not know the "magic" number of your operator, then refer to his website - this information should be there.

Restoring settings manually

Everyone is theoretically capable of setting the parameters manually, but not the one who is not at all friendly with the OS of his smartphone. We present brief instructions(for more or less experienced users it should be enough):

We get to the APN access point settings. Usually through the items "More" => "Mobile network" => "APN access point".
Create a new access point by clicking on the plus sign. A form will open with fields to fill out. Here you will need to set the connection name, username, APN parameters and password to enter the network.
We take the field values from the following table, it contains data for each operator:

Enter the values in the fields, save and reboot the phone. If, after switching on, the network is still absent, it means that things are bad and you have to go to the specialists. Here, in principle, is all you need to know about why the Internet does not work in your own phone.

Trying to connect to a Wi-Fi network may cause the laptop to find the network, connect to it, but not be able to use the Internet. If the laptop notices that there is no Internet access when the network is connected, it will warn you about this with an icon in the form of a yellow triangle next to the connected Wi-Fi icon.

Reasons for not having internet

The cause of the problem lies either in the router, or in the Internet connection, or in the laptop itself, so the methods below will help you solve it in all cases. Perhaps the Internet itself does not work due to problems on the operator’s side, or a failure occurred in the router that allowed the network to be lost, or the laptop incorrectly recognized and used the network.

The list of possible causes is long and needs to be narrowed down. First of all, take another device, such as a phone or tablet, and try using it to access the Internet through the same Wi-Fi network. If this works out, then the problem is exclusively in the laptop.

Laptop says no internet access

If the Internet is not available on other devices, then you need to understand if the reason is in the Internet cable or router. To find out, you need to try to use the Internet connection directly through the laptop. Remove the modem or cable from the router and plug it into the device port, connect and check if there is Internet access. If the answer is no, then the problem is in the modem itself, the wire, or on the operator's side. In any case, the way out of the situation is to contact the support service of the company that provides you with the Internet. Their contact numbers are on the official website.

If a direct connection is successful, then it remains to blame the router, so you need to use the instructions associated with it.

Solving the problem on the side of the laptop

If, in the course of the above instructions for identifying the cause of the breakdown, you found out that the network does not work exclusively on a laptop, then consistently use all the methods below. One of them will most likely return you access to the Wi-Fi network.

Reconnection

Open the network control panel, disconnect from Wi-Fi and reconnect. Perhaps this time the laptop will be able to correctly configure all network settings, and Internet access will return.

Disconnecting from the network and reconnecting to it

Reboot

Reboot the laptop, during this process, all processes in the system will restart. Enabling them again will cause the hung elements to start working.

We restart the computer

Antivirus deactivation

Every modern antivirus has a built-in Firewall (firewall) that provides security when browsing the Internet. But there is a possibility that it mistakenly considers your connection as potentially dangerous and blocks it. After disabling the antivirus, try connecting again without activating it. If this time the Internet appears, then the matter is in the defender, you will have to replace it with another one.

Turn off the antivirus

But in no case do not leave the device without an antivirus, be sure to catch the virus. Install another, at least free, antivirus, or contact technical support the defender you use, telling them that your home network is mistakenly considered dangerous. They will tell you what steps to take to get rid of such an error.

Automatic diagnostics

Windows 10 includes tools to automatically fix most of the problems that users often encounter. There is a similar tool for the Internet module.

Open the list of networks and go to the network settings.
Open network and internet settings
Once in the settings, go to the "Status" block and open the adapter settings.
Click on the "adapter settings" button
A list of adapters will open, double-click on the one that is responsible for connecting to your Wi-Fi network. You can identify the right one by its name.
Double click on the adapter
Start the diagnostic procedure by clicking on the button of the same name.
Press the "Diagnostics" button
Wait for the automatic scan to complete. The system will notify you of its results. If any problems are solved, then it is worth checking whether Internet access has appeared.
The program will tell you if the errors are fixed

Manual change of settings

Perhaps the connection settings are messed up, you need to check them yourself:

While in the adapter list window, expand the properties of the one you need.
Select adapter and open properties
Find the IPv4 protocol used every time you connect to the network and open its properties.
Select the IPv4 protocol and open its properties
Assign automatic lookup of the IP and DNS address of the service if these values have not been set before. Check if it helped to get internet access.
Specify that IP and DNS lookups should be performed automatically
Perhaps the problem is in the DNS servers, so let's try to use analog free servers from Google. Install the primary and secondary gateway respectively: 8.8.8.8 and 8.8.4.4. Check the network status again.
Set the values 8.8.8.8 and 8.8.4.4
Changing the IP may also help. For the main IP, we change the last digit to any, and look for the value of the main gateway on the router itself. It should have a sticker that has a value similar to IP and consists of four numbers separated by dots.
Specify the desired IP addresses and gateway

Solving problems on the side of the router

If during the search for the cause you find out that the problem lies in the router, you need to make some changes to it. Use all of the methods below in turn, they are in order from the fastest and easiest to more serious options.

Reboot

Rebooting will cause all the processes carried out in the router to start their work again. If any of them was in a hung state, it will come out of it and, possibly, provide stable Internet access.

Turning the router off and on again

Reset

There is a chance that the router settings have been knocked down. Most The best way their recovery - rollback to factory values. You can carry it out using the small Reset button, located on one of the panels of the router. Hold it for 10-15 seconds until you notice the lights turning off, indicating that the router is rebooting. After it is turned on again, all parameters will be restored. Check if this helped solve the problem.

Press the Reset button for 10-15 seconds

Configuring DHCP

In some situations, you will have to specify DHCP manually, for this you need to perform the following steps:

What to do if nothing helped

If none of the above methods solved your problem, one option remains - the cause of the breakdown lies in the physical part of the router or laptop. The Wi-Fi module is probably broken, it needs to be replaced. This can be done at any technical service, before contacting which it is worth checking whether the warranty has expired. If the warranty has not yet expired, repairs in the official service will be free.

If you have a connection problem, first find out which device is causing the problem. Then reboot the problem device and check its settings. Do not forget that the Internet may not work due to problems on the operator's side.