It's simply a case of choosing whichever flavor of snake oil you like best.
Ditto that! Don't forget Tune-Up Utilities 2012 by AVG - marinated in extract of Burmese python spit.
I agree with this completely. Luckily for me, all I have to do is press Alt-F10 when my netbook turns on and it reformats it and reinstalls Windows 7 back to factory settings (no CD required). Only takes about 2-3 hours, and cleans everything better than any "experimental" programs (where you never know what will happen with them).If you really want to clean up Windows enough to make it actually faster, do a clean install of Windows. Most system cleaners have ZERO effect on system speed and can do more damage than any potential improvements they might give.
I'm a fan of Windows 7 Manager. Does everything I need and more.
I've always been partial to Arizona Rattler myself. The venom has a nice dry flavor to it, and you feel as if you were out in the desert yourself.