PREFETCH (unwanted files like cookies)
This is pretty helpful information.
To clear out more unwanted files...go to START then RUN and type in the word PREFETCH. This will open up a new box which will more then likely contain a lot of files. Go up to EDIT and down to SELECT ALL to highlight them and then go to FILE and down to DELETE. I've had as many as 60 in there at one time..:)