Second, please check whether the network connection in the upper right corner of your computer is a red cross showing the disconnected network style. Or open my online neighborhood to see if the local connection is connected.
If a red cross is displayed, please check whether the network cable interface is abnormal.
Secondly, check whether the cat's indicator light is abnormal. Under normal circumstances, the lights at the input and output of the cat will light up.
If there is no abnormality, please turn off the cat, restart it after one minute, and try the network connection again.
If it doesn't work again, it's a system problem.
Third, first of all, please make sure that you didn't log on to the horse-hanging website before you were disconnected, because the horse-hanging website would lead to disconnection. If so, please disinfect thoroughly, and then 360 security guards have a computer clinic, and you can choose to repair the Internet.
After the overall anti-virus repair, it is not enough. Reinstall the network card driver. You can download and install the software according to your computer model.
You can also connect the cat to other network devices to see if it can be used. If you can, it is your computer itself. Please try the third solution.
The ultimate weapon, reloading system, is not recommended.
Pure hand tour, hope to adopt. There are other questions to add.