I installed the patch that was in my account but now when I want to launch the game it tells me I don't have the disc in the drive. What is going on? I bought it from gog.

Reinstalling the game did not help. I did not have this error on my old computer. I reinstalled windows on my new hardware and I keep getting this error now.

Edit: I solve it by totally removing the game, going into the registry and removing all entries from gog and cd project, restarting my computer and installing the game again. Now it plays fine.

P.S I don't recommend registering the game as it causes the game not to play at all. I tried to play after registering before I reinstalled the game and it restarted my computer after a few seconds into the game. Since not registering it has played a lot better. I don't know why. I choosing the same options and settings as before.

Maybe someone can help me with this. I emailed gog about this and no-one has helped me

No other game does this. I also have software like adobe creative suite and I don't get this restarting problem. I see it is quite common when I googled this problem..