Just come across this little freeware utility. I used to use Spider on my old PC, very good a cleaning the "index.dat" files that are hidden and contain details of every web page you have visited since you first switched on your PC even after clearing Temp Internet Folders etc. Spider does not work on XP, however this one, unfortunately called Crap Cleaner does.
It has no adware/spyware.
http://www.ccleaner.com/