Laptop does not find my WLAN, all others in the area already?

Wa
1

I set up my new Internet (Vodafone) over the WLAN cable router via LAN cable over my laptop. Well, when everything was configured, all devices could be easily connected to the WLAN (smartphone, PS4, etc.) except my laptop! Everything already tried: WLAN router resets, laptop restarts, even trying to update the network adapter (but was up to date).

My LT has Windows 8!

Pe

Is the WLAN on the laptop also turned on?