If your running Microsoft XP a log of everything you do is build in a file called "prefetch" When you fire up the old computer and it settles on the desktop go to the start button. Click it. Then go to search and type in "prefetch" to search file and folders. Take a look. Then delelte it if you want. Me I don't like the idea of someone tracking what I do on the computer so I delete it first thing every time I get one the computer.