If you are using the Win8.1 system and you are prompted to connect or the network is restricted, etc., you may not be able to access the Internet. The cause may be various. The following is a small series to bring you a Win8.1 system network connection fault anatomy, maybe you will find a solution here.
First, check the network cable
to ensure that the network cable is no problem, have met friends before Repairing the computer says that you can't get online. 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-acquisition of 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.
If we get the IP address of the normal network segment of our company network or the IP network segment set by the router at home, this is normal. 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 the address information.
ipconfig /renewGet new address information.
Resolve network problems. Open our computer's network adapter. If you use a wireless connection to the network, you can open our wireless network adapter network adapter. At this time, you can click “Diagnostics” in the lower right corner to open Windows Network Diagnostics <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 with Windows Diagnostics.
If you check out related issues, you can fix them based on the problems found.
4. 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 the case where some users find that they have already dialed the number but still connected to the problem.)
At this time, you need to ensure the IP address and networked device of your computer (router). Etc.) are on the same network segment. To do this, open “Control Panel”——“Network Connection”, find the current local connection, right click on it, select <;properties", double click on “Internet in the "General" tab Protocol (TCP/IP)”, select “Use the following IP address”, generally fill in “192.168.0.1” in “IP address", fill in "subnet mask" ;255.255.255.0”, don't fill out the other, then click “OK” 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.
5. NIC driver Trojan virus
Recently, I saw many friends who reported that when upgrading from Windows 7 to Windows 8 system, they found that the network connection is limited or unable to connect. In this case, it is necessary to ensure the driver of the network card after the upgrade. is correct. You can use the driver wizard and other software to update and install the latest drivers. Of course, keep in mind that many computer problems may be caused by virus Trojans. You can use anti-virus software to check and kill.
6. Network Operators
When we enjoy the Internet services provided by operators, don't forget that some of the reasons for not being able to access the Internet sometimes come 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.