How to connect to wifi after ethernet?

Question

WiFi

Good afternoon. Windows 7 is installed on the Samsung laptop. I always connected to the network via wifi. Today I decided to check the cable on this laptop, which is connected to the same router. Previously, this cable was connected to a PC. Well, I connected it to the laptop, checked it, the cable works. Now I decided to switch to my standard wifi. The network finds However, when I try to connect, it says: "Windows could not connect to 'NetworkName'".
Rebooted. Deleted the network from the list of saved ones. Nothing helps. How can the problem be solved? Thank you for your help.

Answer 1

To check, try setting the channel number manually in the router settings. use the channel number from the middle of the list, not the extreme value.

Answer 2

Are you sure the problem is with Windows?
Pulled out the cable?
Router rebooted?