After Formatting

The other day I formatted my computer at home as it was really slow on start up due to a game that I installed. But after formatting the computer and reinstalling it, startup is really fast, but when I want to shutdown it is so SLOW! Wahlah. I have no idea why is it like that either. Wonder if I fill up my pc with many programs? Nah I don't. Just install what I need like Office, Reader, 7Zip, MSN and YM...Maybe time to do some tweaking :P