DooMer 4ever

Every single game I play sooner or later minimizes to the desktop without any visible reason (Except for Doom3 which just stops responding to either mouse or keyboard until I press alt+tab). I've had this problem since I bought a Radeon 9800 PRO video card and I haven't found any reason for this.

Any ideas how I could fix this problem? It's starting to get REALLY annoying. And it's not screensaver and I'm not pressing the windows button or anything like that.

Things I have tried this far without success:
- updated directx
- updated video card drivers
- reinstalled mouse and keyboard drivers
- scanned for viruses

Heh, I was browsing VGmix and just for fun I listened to some of the songs that had the lowest ratings. And just look at what I found:

http://www.vgmix.com/song_view.php?song_id=1864

It must be ShadowRunner, since he writes exactly in the same way (no space after dots). Please don't start a flamewar or anything because of this, since it would be kind of pointless as he's no longer with us in Doomworld as far as I know. I just thought this is quite an interesting find. Heh.

Btw, there are some other songs made by him too, though I haven't dared to listen to those yet:

http://www.vgmix.com/song_view.php?song_id=1221
http://www.vgmix.com/song_view.php?song_id=2093
http://www.vgmix.com/song_view.php?song_id=1991
http://www.vgmix.com/song_view.php?song_id=1754
http://www.vgmix.com/song_view.php?song_id=1238
http://www.vgmix.com/song_view.php?song_id=1034
http://www.vgmix.com/song_view.php?song_id=1160
http://www.vgmix.com/song_view.php?song_id=1051
http://www.vgmix.com/song_view.php?song_id=1277

And sorry if this has been posted before, though I doubt it.