Nikhil Dev

CCleaner optimizes your PC by removing various kinds of system detritus, such as temp files, old Registry entries, and invalid shortcuts. It also helps promote privacy by deleting your browser’s URL history, cookies, and so on.In other words, it cleans out the crap (hey, I’m not the potty-mouth; that’s what the “C” in CCleaner stands for). I’m not usually a fan of utilities like this, as they sometimes do more harm than good, but CCleaner has a stellar reputation (as evidenced by its 4.5-star average on CNET’s Download.com). Even so, if you’re a Windows XP user, I highly recommend running the System Restore utility and setting a rollback point before running CCleaner–just in case.

CCleaner is freeware (the developer accepts donations). It works with all versions of Windows (even Vista Beta 2).