PC World: "Fact: Your Windows PC is slowing down. Maybe it takes longer to boot up or shut down. Perhaps the hard drive grinds in the background constantly. Or maybe launching an application takes much longer than it once did. And although Windows 7 is speedier than previous versions, it can still become sluggish, particularly if you install and uninstall a lot of applications.
In this article I'll look at what it takes to clean the crud out of your system that has built up over time. I'll specifically discuss boot times, hard-drive issues, and the mysterious Windows Registry. I'll also explain how you can minimize problems in the future and change your crud-inducing habits."