Can anyone help

I can access the router/internet via the ethernet cable.
I remove the cable and receive display that signal strength is fine but when I try to connect to the Router "wirelessly" it fails to connect and drops the connection.

I sense it must be some setting on my PC (because ethernet connection works) but don't know what to look at.

I followed the SKY Broadband Help advice re checking the settings on the LAN connection but all settings match their advice.