Reasons and Solutions:
1. May be caused by DNS error, the solution is to select the \"DNS preferred\" tool in the toolbox of Tencent computer manager, click \"immediate detection\
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2. Too far away from the router or through the wall too much, the signal strength is low, and minimal fluctuations occur, which will lead to instantaneous disconnection (generally difficult to detect). You can see the speed and strength of the connection state, if it is very low may lead to no Internet access, please adjust the distance or placement of the machine and router, of course, you can also be equipped with a high-gain directional antenna to amplify the signal.
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3. The router has configured security measures such as IP address restriction or MAC address binding. Check whether the router has configured IP address restriction or MAC address binding.
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4. Reconfigure your wireless router.
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5. If the preceding Settings are correct, reinstall the wireless NIC driver.
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6. If the fault persists, back up important data and reinstall the operating system.