QUOTE(twistedsymphony @ Jul 19 2007, 06:14 PM)

I'm going to guess you screwed up your HDD and the glitches you're seeing are due to a corrupted cache from bad sectors.
... just a hunch
borrow a HDD from someone else and try playing with that HDD on your machine to see if it fixes the problem.
or take your HDD to someone elses house and see if the problem travels with you.
but it's a laptop hard drive, they are designed to be able to deal with shock?