That’s because Windows doesn’t efficiently clean up after itself as it goes about its daily business. Here’s the problem: If you pry open the registry, you’ll find it about as cluttered as a teenager’s bedroom. The paths to the last dozen or so images or documents you opened are there, too, as are the details of the programs you have installed or uninstalled.
For instance, the URL for this article probably has an entry now, somewhere. Practically everything you do in Windows is recorded in the registry. The dark and scary place known as the Windows registry. The Windows registry is a repository for a massive collection of details about your computer-where programs are stored, which helper programs (known as DLLs) are shared among your various applications, listings of all your Start menu shortcuts, and pointers to the programs that fire up when you click on an icon. While fooling around with your Windows registry does involve some risk, cleaning it out can have a positive impact on your PC’s overall performance.
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I say, “Big, bloated, and full of errors.” What do you say? Right, “Windows Registry.” One more: “Messing with it is risky.” If you guessed the registry again, you pass.