Quote Originally Posted by Galagros
I tried using CTRL+ALT+ESC this time and nothing happened. So then I tried CTRL+ALT+DEL and nothing happened. When I pressed the windows key my cursor showed up and I could move it around, but still do nothing. I had to turn off my computer manually again.
Does CTRL+ALT+DEL ever work, even when the game is not running?

Try CTRL+SHIFT+ESC, this is the true key combination for the windows task manager. CTRL+ALT+DEL is for Windows Security (note: if you're using the welcome screen you won't see windows security only task manager).

The fact that the windows key does force the desktop to appear is worrying. It may be that CTRL+ALT+DEL is opening the task manager window in the background, hitting the windows key afterwards may show you the desktop and the task manager.

I think the cause may be your graphics card and it's newer drivers. There may not be alot you can do about this. You can try older drivers if you wish.