Kingsoft PC Doctor
Full user review
"Slim, FAST, Remarkable, But Too Mysterious"
This is the fastest PC utility suite I have ever used. Pretty on the eyes, provides surprisingly detailed information, in some regards. Stable; hasn't crashed itself, nor crashed any PC I've put it on. More responsive than other utility suites I've tried. Gives you everything you need for proper PC maintenance and nothing more, making it a very trim, yet powerful utility suite.
Light on the controls (I still haven't figured out how to tell it what cookies to keep, what registry items to ignore, or what files/folders to skip), meaning that a good amount of what it's doing to your systems is based on blind faith that it won't mess anything up. Would you take a risk like that with your PC? ;-)
All in all, it's a great program with some wonderfully bright stars to it. Unfortunately, since it takes some undue power and control out of the user's hands, I wouldn't recommend this for any PC that has a use outside of basic web browsing and simple application running; the more complex the PC, the more likely this program may do something that you don't want, and, might not be able to stop.