[shared via Google Reader from How-To Geek]
PC cleaning apps are digital snake oil. The web is full of ads for applications that want to “clean your PC” and “make it feel like new.” Don’t pull out your credit card — these apps are terrible and you don’t need them.
If you do want to “clean your PC,” you can do it for free. Windows includes built-in PC cleaning tools that can do almost all of what the average PC cleaning app will do for you.