[I Used CCleaner and now my computer dosen't work properly]

I wonder if you have tried chkdsk? From the start menu select run then type in chkdsk, I have found it quite good at recovering lost or orphaned files

 

also try to get updated to XP sp3..................................whiteknight.

 

ps. This morning I thought I'd check my copy CCleaner v2.10.618

 

I ran chkdsk before using it and after it again with some screen shots

 

before CCleaner

 

Shot at 2008-08-26

 

and after CCleaner

 

Shot at 2008-08-26