i have currently both ...system mechanic pro 6..and tune up utlities 2006 installed on my pc... from past 3 months i am using system mechnic pro 6...and i find it really...worth.. just today i installed...tune up utilities 2006...after hearing about it by many people.... so i wanna know which one is better...as i find both of them very much similar...expect that system mechanic ...does not have visual optimizer.. when i scan my computer with sys. mechanic. pro..it does show a few problems..once in a while..like 7-8 problems...and corrects them..like registry.settings,clutter,..internet settings..speed and all.. but when i scanned my comp with tune up utilities 2006 for the first time today i was horrified ...to see a total ..of more than 400 problems... then tune up utilities...rectified the problems...within seconds after just one second when ...i scanned again using tune up .some of the problems..repeated..again and again..and finally i was left with 12-15 problems..that it always showed even after correcting it... so what i want to know..is which one would be better...to keep my pc. optimized.. also...is it ok if both of them are used together..and would not cause problems for each other..and lead to slow down og my pc instead of ..a faster pc !!