Penumbra Overture, frequent switch to my desktop

[flcn27]

I don't have an anti-virus program right now (without an anti virus problem you'll never have any viruses at least you won't know if you have them) and I also don't have Windows Aero. I just got the exact same problem with Penumbra Black Plague (love that game btw).

The only other active programs I can see:
XboxStat (apparantly this program is always active, it has something to do with my Xbox controller for the PC)
PnkBuster
GameOverlay (from Steam)
Steam
Razer (Razer mouse&keyboard)

I'll try disabling some of them and see if it helps.