If you're a level 20 PC nerd, you'll go to extreme lengths to improve system performance. And if you have budget to spare, you'll probably first turn to hardware upgrades—an almost surefire way to get an old PC purring like a hot rod.
Sadly, though, throwing money down the hardware hole isn't always an option during our uncertain economic times, so free software tools that promise performance dividends become an enticing option. These utilities purport to cure a multitude of PC ills, and make grand claims of improved performance, faster boot times, and enhanced privacy. Some claim to help even with relatively new PCs running Windows 8.
The competition
Plenty of these utilities look like scams—search for “improve system performance,” and you'll see what I mean. So, to save you the trouble of finding the best clean-up utility yourself, we rounded up five free PC cleanup utilities for the purposes of this article: SlimWare Utilities’ SlimCleaner, Piriform’s CCleaner, COMODO System Utilities, Ashampoo WinOptimizer, and PC Booster Energizertech's PC Booster.
Read entire article Speed test! Five PC clean-up utilities: Do they really work? on PC World