Troubleshooting and countermeasures for win8 network connection failure

When using a computer, we often encounter situations where the network connection is restricted or cannot be connected. There may be many reasons for the problem. Of course, some people have resorted to the computer to kill the technology "restart the computer" can solve the problem, but this nirvana can not solve the problem in most circumstances. Next, combined with Microsoft's latest Windows8 system, we explained the situation in which the network connection we encountered was restricted or connected, which affected the use of the network. I hope to help friends who have encountered such problems.

If you are using the Win8 system and you are prompted to connect or the network is restricted, you may not be able to access the Internet. The cause may be various. For example, some incorrect settings of the operating system, Internet terminal settings such as routers or cats, and hardware failures such as network card cables. In short, when we use Windows 8 when the network is restricted or unable to connect, you may wish to try the following methods, or you will find a solution to your current problems.

First, check the network cable

Make sure that the network cable is no problem, I have encountered friends before repairing the computer and said that the Internet is not available. As a result, it still could not be solved for a long time. Finally, it was discovered that the network cable was not plugged in or the network cable had a problem. In order to avoid this embarrassing phenomenon, the first step is to explain this situation. Otherwise, it will not be inserted into the network cable for a long time. This is a "single glory". If you have a big red cross on the network icon in the lower right corner, you should first check if the network cable is plugged in. If the network cable is plugged in and functioning normally, a yellow light flashes along the place where the desktop cable is plugged in and the place where the notebook is plugged into the network cable. If the indicator light does not flash, it means that the network cable is not plugged in or plugged in and does not work.

Second, re-acquire IP address information

When the network can not be connected, the first thing that comes to mind is to view your own IP address information. We can enter ipconfig or (ipconfig /all view details) on the command line (cmd) to view.

This is normal if we are getting the IP address of the normal network segment of our company network or the IP network segment set by the router at home. If the IP address information is not the network segment set by the environment, this is an abnormal situation. You need to reset the IP or re-acquire the IP address.

If the following occurs or the IP address starts with 169, this means that the network card does not get the correct IP address.

If we obtain the IP address of the Internet through DHCP, then we can use the ipconfig /release command to release the existing IP address information, and then use ipconfig /renew to obtain the appropriate IP address from DHCP. This method can solve some cases where the correct IP address information, DNS, etc. are not obtained. Sometimes, if the IP address is manually configured in a DHCP environment, the connection is restricted or an exclamation point is displayed on the network icon! The IP address is set to be dynamically acquired.

Ipconfig /release releases address information.

ipconfig /renew gets the new address information.

Three, diagnose network connection

Solve network problems, Windows has a very good tool called "Windows Network Diagnostics", it can help us check the cause of some problems. Open the network adapter of our computer. If the notebook is connected to the network by wireless, just open our wireless network adapter network adapter. At this time, click “Diagnostics” in the lower right corner to open the Windows network diagnosis<;Check:

At this time, a wizard will pop up for automatic diagnosis. In some cases, it will be fixed automatically, and some problems can be solved by using Windows diagnostics.

If you check out related issues, you can fix them based on the problems found.

Four, broadband connection

Many friends are using the dial-up to access the Internet, and the account password has been set correctly. However, it still finds that the network connection is restricted. ADSL virtual dial-up Internet access is based on PPPoE. It is equivalent to establishing a virtual circuit for dialing between your machine and the ADSL office. Therefore, local connection is restricted or no connection does not affect this virtual. The normal use of the circuit (of course, the virtual circuit runs on the real circuit, your network card, ADSL Modem and the ADSL access device of the central office must first establish a physical connection, in order to make this virtual circuit work normally, but in the physical connection The local connection does not have to be assigned the corresponding IP address on the software system). This is because some users find that they have actually dialed the number but still connected to the problem.

At this time, you need to ensure that your computer's IP address and networked devices (routers, etc.) are on the same network segment.

The method is to open “Control Panel”——“Network Connection”, find the current local connection, right click on it, select “property>, in “General” In the card, double-click "Internet Protocol (TCP/IP)", select "Use the following IP address", generally fill in "IP address" in the "IP address", "192.168.0.1", in the "subnet" Fill in “255.255.255.0” in the code ”, do not fill out the other, then click “ OK & rdquo; to solve the problem. If the problem is not solved, please note that the IP must be in the same network segment as the IP address of the ADSL Modem. If the current computer joins a workgroup or domain, it should be set according to the situation. Sometimes you can remove the option to notify me (M) when this connection is restricted or no connection in the "local connection" of the network connection.

V. NIC driver

Recently, I saw many friends who reported that when upgrading from Windows7 to Windows8, they found that the network connection is limited or unable to connect. In this case, you need to ensure the network card after the upgrade. The driver is correct.

VI. Network Operators

When we enjoy the Internet services provided by operators, don't forget that sometimes some of the reasons are not from the operators. In the past, the dormitory could not be connected to the Internet, and then several people in the dormitory had been checking out. Finally, it was found that the result of calling the telecom customer service was arrears. There are also some cases where the account is bound, and when you can't get on the network, you may also call the operator of your choice. Another important point is that you can remember the various codes when you are unable to access the network or dial out problems. For example, the codes 651, 678, and 691 are important basis for our troubleshooting.