Wi−Fi doesn't have valid IP configuration (Nothing else worked)

If none of the other solutions helped, consider reinstalling the driver of the wireless card as the driver might be damaged.

Check out the don't know how to download and install drivers guide, to learn how to download and install the appropriate drivers for your computer.

If you have tried everything else to fix this issue, but without success, consider resetting the operating system.

The don't know how to reset my device guide will instruct you on how to reset the operating system safely.

Note: Bear in mind that resetting the operating system involves data loss (i.e. you might lose your pictures, music, videos and other invaluable documents).