Hi, guys

Basically the title says is all. I've played this game before, everything was working fine. Suddenly, this happens and the cursor gets stuck in the middle of the screen. Any ideas on how to fix this?

Edit: I tried verifying the game files, aslo reinstalling the game, I checked if my Bitdefender antivirus was blocking somehow the game (not the case), but the problem still persists.
This problem happens in the Eye of the Beholder, too.

I have to mention that the keyboard is working in game, only the mouse doesn't.