If I leave the computer alone too long and the monitors shut off (While Media Center is open, paused on a video), it will crash either right away or when I try to recover. It's a blue screen with very little text at the top, something about hardware failure and memory. When it happens next I'll tell you exactly what it says.
I also haven't installed any drivers
recently, only uninstalled/reinstalled the latest driver
for my graphics card, but this started happening well after that.