u/Brolysconi

Hi guys, today i tried to start a match with my friend in zombie mode, but after the countdown nothing else happens, it just stays in the lobby. Then i can't close the game, and the next time i start it, after closing it with task manager, it stays in windowed mode and i can't switch it back on full screen.
I tried to repair, to uninstall and install it again, i searched for hidden files that wouldn't be cancelled if not manually. Nobody seems too have this issue.
The game was purchased on steam, and even using third party sites to download it, it has the same issue.