What happens when a computer suddenly can't connect to the net

1. Internet access via dial-up

2. Connect by wireless means

1 Check the status of the wireless signal to confirm the signal is normal. Wireless signal icon in your lower right corner of the taskbar, such as wireless signal is not good, please move to the wireless router near the location of the test, so that the Red Fork status, please confirm that the wireless network card driver is normal, you can open the Device Manager to view;

2 Confirm whether you can search for wireless networks that need to be connected;

3 If you can not search, please confirm that your wireless router has turned on the broadcast function, such as you can not confirm, please contact the administrator to handle, or through other computers to obtain the corresponding network name, for manual connection;

4 Please confirm the wireless password input is normal, wireless password access please contact the network administrator;

5 after connecting to the wireless network, please confirm whether you need to manually set the IP address;

6 in the routing settings may have a MAC address and IP address binding relationship, please contact the administrator to confirm;

7 Finally, we suggest that you can restart the routing test if it is convenient;

8 Download the wireless network card driver, try to reinstall the wireless network card driver test again.

3. Connect over a wired network but not a dial-up connection

1 Check Device Manager, device driver, etc. is normal, such as in the "network adapter" has unknown equipment, please download the corresponding network card driver, to install;

2 first check the state of the local connection, such as the display of the broken state, please check whether the local connection is disabled, such as deactivated, please open the test.

3 If the above problems can not be resolved, please check whether the network cable is normal, if you can try to replace the network cable, or other computers on the network cable directly replaced to this host test, if still ineffective, the cause of this problem is generally hardware-led;

4 If the connection is normal, the network appears to be restricted state, then confirm that other computers are connected to normal, such as other computers are also unable to connect, this problem to determine the cause of the network environment, the problem does not appear in computer products, please check the network problem;

5 if the elimination of network problems, please confirm that the network needs to carry out a fixed IP address to the Internet, please try to manually specify the IP address of the way to test;

6 If the above solution can not solve your problem, please try to download the corresponding model of the network card driver, the installation of network card driver after the test is normal.