1. It may be caused by a DNS error. The solution is to select the "DNS Optimization" tool in Tencent Computer Manager's toolbox and click "Detect Now". After the detection, you can see the average value of DNS. The lower the average value, the faster the DNS response. Just select "Enable" with the smallest average value.

2. Too far away from the router or too much through the wall, the signal strength is low, and there is little fluctuation, which will lead to instantaneous disconnection and reconnection (generally difficult to detect). You can see the speed and intensity of the connection state. If both are low, it may lead to the inability to access the Internet. Please adjust the distance or placement between the machine and the router. Of course, you can also equip with a high-gain directional antenna to amplify the signal.

3. The router has set security measures such as IP address restriction or MAC address binding. Please check whether the router has set IP address restriction or MAC address binding.

4. Reconfigure your wireless router.

5. If all the above settings are checked, you need to reinstall the wireless network card driver.

6. If it still doesn't work, it is recommended to back up important information and reinstall the operating system.