I'm running XP (SP3) on a Dell that's starting to get a couple of years under its belt. I give it a monthly 'Guttman' clean with CCleaner with absolutely everything ticked including the 'Advanced' settings, I'm running Comodo Firewall Pro, Avast, Ad-Aware (lavasoft) and I keep Webroot AntiVirus with AntiSpyware running also. A monthly defrag happens too.....if I remember. After all that, my question is: Is giving the system a regular clean with CCleaner in the way I've described enough to prevent cluttering of the system with redundant crap? I read a lot about backing your system up and then wiping it and starting fresh, but is it really necessary? It is time consuming and I'm curious as to what the benefits really are. I'm not trying to start an IT junket here so please keep it simple. Cheers!