A clean Windows registry can not only prevent a host of problems, it can help your system run faster. The registry is like the brains of your computer. Its technically a database of information put there by every program, which the system refers to repeatedly. It was designed to make Windows run faster. But if you dont have a clean Windows registry, it can actually slow your computer down.
Every time you install or uninstall a program, your registry changes. This is true on any Windows system, like Windows XP or Vista, and older versions of Windows, too. The registry even changes as you use your computer in other ways.
Registry keys are like file folders full of vital program information. These change and sometimes become obsolete. Sometimes when you uninstall a program, one or more keys are left behind that you no longer need. These extra keys just take up space in the registry and make the database much less efficient than a clean Windows registry.
Compare it to an actual filing cabinet. If every file has a purpose, then youll have fewer files that are easier to get to. But start adding and leaving in files that you no longer need on a regular basis....