last night while shutting down my computer (it was still at that blue screen that says "shutting down") I accidentally dropped my laptop off of a couch. it was a 1-2 foot drop. I thought everything was fine, only a small crack about 1 inch long in the bottom right corner of the casing (on the inside, next to the keyboard) but then I turned it back on, after having been off all night and most of the day, and I noticed my cpu is really "sensitive." simple tasks such as switching web pages will now send it all the way up to 99% or 100%. I'm worried that this may be because of cpu damage. could that be the case? or do I simply need a defrag and cpu optimization? oh yeah, and I'm running windows vista home premium on an HP tx2500z.