Cleaning the Registry as someone who is a total novice in this area i would appreciate some help on this. my machine is still relatively new but already i've had spybot delete another program before i had a chance to uninstall it and it still comes up with references to remnants. also i've installed and uninstalled quite a few other programs, so i'm wondering how much junk i'm accumulating. the question is Does it matter? if i just leave the registry to it's own devices will the only problem i have with junk accumulation be a slight degrading of performance? will a reg cleaner detect entries put there by spyware and trojans? and do spyware and trojans put entries in the registry - if so why? - don't they want to run anonymously? if the registry is corrupted by a registry cleaner can it crash windows requiring a reinstallation of XP? for now i'm leaving it well alone but all feedback most welcome on this sensitive issue.