Disk cleaning is where it deletes old files that arn't used anymore and fixes problems with programs and files it also deletes history of browsers, etc. and defragment your hard drive to make it faster like if you use your computer a lot and don't defragment files get all over the place and if you defragment they go back to where they should be.

Clean as in defragment and disk cleaner? yeah I know a few programs that should help you out. For the disk cleaner you should get a program called Ccleaner best damn program ever made! and for defragment you want to look for a program called Defraggler which is made by the same people those two pieces of software are free and godly.

Looooooooooool
your tbar is very cool

Dont you D: me

Not as special as you, beautiful. =)