when i play games any game, my PC keep switching to windows-start-desktop and interrupting my game
it doing so every 30 min
i didn't touch any of settings (i think)
it started doing so after i moved my PC to new home, maybe connected some wires wrong?
btw OC XP and currently using Opera

Did you get a new keyboard?

I know my keyboard has a button that if I push it it brings up the start menu but other than that I am at a loss