Whenever i join a game in W:A and get kicked it just completely freezes.. I've waited for 10 minutes but still nothing.. And then i tried Alt F4.. Shift Esc.. Ctrl Alt Delete.. But still nothing.. I end up having to turn off the computer from the wall and turning it on again.. So could anyone help me please?

If you press Num Lock, does the led toggle on your keyboard?

Do you use a software firewall (or other software with a firewall feature)?

Yes. And also Yes. At the moment im using Avast and my numlock light is flashing like it should.

It probably means that Avast is showing some dialog box, but you can't see it because the game is in full screen.

Try adding W:A to your firewall's exception list, or completely disabling your firewall.

Hmm Well I also found that it happens sometimes when joining games, leaving or even Alt F4`ing during games.. So I switched Avast onto gamer mode and it hasn't happened since.