Computer does not go online hint: Windows cannot communicate with device or resource (primary DNS server)

Garbage station bloggers are still using the WIN7 system, recently through switches and routers are always not connected to the Internet, and other computers on the network can be networked, check found that the computer desktop in the lower right corner of the internet appears yellow exclamation point, after detection prompts "Windows can not communicate with the device or resource (primary DNS server)", Is still Baidu, Google search to find how to solve this problem.

The search found that most of the resolution "Windows cannot communicate with a device or resource (primary DNS Server)" method is as follows:

① Modify IP address and DNS address for automatic acquisition;

② update NIC driver or replace NIC;

③ the computer system to reload;

④ to modify the IP address of the sub router;

⑤ Delete c:windowssystem32driversetchosts document contents;

⑥ uncheck the "Allow network card to be turned off to conserve electricity" option

Test the above n many online methods are unsuccessful, finally think of their own computer is malicious prohibit network?

The general prohibition of computer networking in the LAN can use Peer-to-peer terminator (click to enter the tutorial) or prohibit the MAC address of the network card, of course, the garbage station blogger used a peer-to-peer terminator, no matter who will not be 24 hours to boot with Peer-to-peer Terminator network, so I thought of setting up a router prohibit MAC address, So decided to modify the network card MAC address test can be networked, the following methods:

Open Control Panel-all Control Panel-network and Sharing center-local Area Connection-right click on "Properties"-"Configuration"-"Advanced"-Select "Network Address"-Modify "value" (Enter a new MAC address, can only change the last digit or letter)-click "OK" to complete the modification, At this point the MAC address of this machine has been changed to a new MAC address.

How to view the local MAC address: Click Start-run-enter "cmd"-click "OK"-Pop-up dialog box enter "Ipconfig/all"-click Enter-in the return information, view the physical address of the Ethernet adapter "Local Area Connection" (physical Address) is shown below:

This is one of the ways to solve problems where your computer cannot be networked and prompt "Windows cannot communicate with devices or resources (primary DNS servers)"

The computer can not access the reason to restore a lot of the following I organized some

1. There is a problem with DNS for network connectivity. Open the local network connection, check to see if the connection status is normal, send and receive the package is normal, if the packet sent and received is 0, open the Local Area Connection Properties window to see if DNS and gateway is correct, preferably ping the gateway and DNS, to see if you can ping, if not, You can try a different DNS.

2. Virus infection. Now many viruses can cause network connection is normal but not the phenomenon of Internet. This situation is often shown in the open IE, the IE interface in the bottom left box prompts are open the page, but no response for a while.

There are many reasons why computers can't surf the internet, this article is a few examples! If you use anti-virus software can never solve the problem, then need to manually remove the virus. View the process in Task Manager. If you have an unfamiliar process with a CPU occupancy rate of up to 90% or more, then be sure to end it. If this does not end, start the program in Safe mode and delete all items associated with the program in the registry.

QQ can not be on the Internet problem analysis

There are many users who often encounter such problems, network connectivity after the normal login QQ chat, but can not open the page, the total hint "This page can not show" the problem is almost some people as a "terminal illness", the common solution is to reload the system, in fact, the cause of this phenomenon may have several reasons, as long as the right remedy, It's still a good solution.

Reason one: System Winsock communication component failure

appear to be able to QQ can not open the page about 80% of the situation is due to the destruction of Winsock components, components are damaged by several reasons: the cause of the virus. Imperfect anti-virus software to remove the sequelae of the virus. Pirated Windows XP, installation of operating system patches and abnormal system Restore, and so on, if it is Windows 2000/XP, directly click the "Start" menu, select "Run", enter "Sfc/scannow" and determine, if it is windows98/me, then enter " SFC ', the system automatically checks the replaced system components and restores them, which requires the user to insert the operating system's installation CD.

Reason two: Domain name resolution error

Domain name resolution errors are also one of the common reasons why Web pages cannot be opened. Computer Domain name resolution first to access the local Hosts file, and then log on to DNS (domain name resolution Server) on the query, especially anti-virus website access, Hosts file in the user system directory, the default is "C:\WINDOWS\SYSTEM32\DRIVERS\ETC Directory, we can use Notepad to open it, under normal circumstances, "127.0.0.1 localhost" can be deleted below.

Reason three: IE browser is corrupted

If you can use QQ to surf the internet, use other browsers such as Firefox,opera can also open the Web page, only IE can not browse, then most of the browser itself is damaged, need to reinstall IE.

Reason four: Incorrect proxy settings

Sometimes setting up the wrong proxy server may also cause the Web page to not open, and we can view and modify the proxy server settings in the connection settings under Internet Options in IE.

Reason five: Virus problem

The real cause of the virus directly caused by the lack of access to the Web page is not a lot of, but some write imperfect virus, Trojan will inject IE process, causing users to open IE after the machine resources defeated 100%, the machine was suspended animation state, this situation to upgrade anti-virus software to the latest version, antivirus.

There are several reasons why the computer can not open the Web page because of the reason and the solution, can basically solve this problem, but there may still be some other factors caused the machine failure, it is recommended that users do not casually format.