WLAN adapter broken – but what exactly is wrong with it?

I have a 2.4 GHz Wi-Fi adapter and a Fritzbox 7490. I'm the only one in the shared apartment whose Wi-Fi drops for 1-2 minutes almost every day, and this has been the case for several months now. There are probably a lot of network disruptions, at least that's what the Fritzbox indicates. But only…

My Wi-Fi adapter is no longer working? Please read carefully first, don't write immediately.

My WLAN adapter on my computer is no longer working, and I did some research and found out that you should go to "Network Settings" and enable the driver there. So now I'm on the screen, and it says my driver is disabled. Unfortunately, I can't enable it! A little later, it said that the…