I was a happy camper using system mechanic pro (ver. 6) but the latest verson (7) has been a pain in my side. I want to use some other software to maintain and speed up my computers but I don’t see the "best" one out there that I can use on Vista and XP.

What is the best utility program for WinXP (like System Mechanic Pro, Norton Utilites, etc.) Freeware, shareware. Cleans your registry, cache, optimization, tweaks, defrag, error fixing, uninstalls, boot defrag, etc.
Thanx!

I have a new desktop gaming computer and I would like to know of a good program that I could get that would fix errors and keep my computer fast and working like new. On my old laptop I used System Mechanic but I was wondering if there were any better programs. Thanks.

I am using AVG AV7.5,AVG AS in my system which one is a freeware and updating regularly.After I installed AVG AS the system is working slow.Already I installed many freewares (like tuneup utilities,system mechanic,everest,iolo,ccleaner,Advanced windows care V2,memory optimizer,PC wizard2007,)frequently,used these all one by one and uninstalled every thing now,keeping only AVG AV and AVG AS only.
Now I want to clean my whole computer,cleaning the registry,hidden files,and removing unnecessary stuffs etc.,so that the computer become fresh and new.
Please suggest me the best solution.Thanks.