The XP Registry manages itself very well. Using one of these so-called
Registry 'cleaners' can cause more problems than they're worth - in some
cases rendering a PC unbootable. I would suggest that you let XP manage the
Registry and not use a 'cleaner'.
I use EasyCleaner all the time. Make sure that you get the latest version.
2.0.6.373 is the latest. There were some problems with some earlier
versions that rendered Help and Support inoperative, that has been long
since fixed.
Also keep in mind that EasyCleaner creates an undo file upon deleting
registry entries (this is set as default under Options | Registry).