I'm not really into the whole St Patrick's day celebration thing so I figured I'd spend the day backing up the contents of my PC. I have a few series of shows on it, several games downloaded through Steam... forty or fifty gigs of stuff in all. Naturally when I turned the PC on this morning it had crapped out completely and is reporting nothing more informative than "a disk read error occurred".
EDIT: Some bios repairing and tweaking fixed it. Time to do some backing up while the getting is good.