Well some of you might find with vista, after installing sp1(it leaves old files incase you want uninstall sp1), that you tend to loose a bit of hard drive space, anywheres from 1-6 gigs, (this isnt so bad if you're operating system is running on a drive 500gb or more, but for people like me with a 150 gb raptor, those extra gigs i would like back.

so hit ur windows key + R, and type "vsp1cln.exe" this will open up command prompt, then type "y" and hit enter, and it'll run.


also another major take up of space:

Are you aware of System Restore Points and Shadow Copies? They can be
deleted as part of a disk cleanup (go to the "more options" tab). Of
course, you want to feel confident that you don't need the Restore Points
and Shadow Copies before deleting them.