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#21
I wouldn't touch it, or any other 'tune up your PC' software. I do use CCleaner, but only for removing junk files - 'cleaning' the registry can be a recipe for disaster. This is a typical opinion...
Repair/Malware programPCacceleratePro: junkware/scareware, or worse
Reimage Repair: not much better; for basic computer users, such programs can cause more harm than good.
Many of your stability issues may be the result of having run these (and similar) programs...