I have had this computer for just over a year, it is used and it came with ME. Now, over the last year I downloaded many things and wasn't responsible enough to keep track of them and uninstall the things I wasn't using. I only have a 4 gig hard drive and it is almost completely full. It was full about 80% but I deleted some JPG's and Mp3's this freed it up to about 5%. I have downloaded different programs to help me clean the hard drive a little but some of them don't seem to work for me. I know a bit about computers but I have no idea what I should delete for fear that I might delete something criticaly important to the computer's hard drive. I would really like to free up some space because the computer is really slow. Can someone please help?