Hey, Windows users! You probably know that frustrating feeling when your computer isn't behaving the way it should. There are a few things you can do to make your PC run as smooth as it used to -- such as accessing a previous System Restore point in Windows XP and Vista.

In a nutshell, System Restore is a tool that returns your computer to a previous state. Think of it as a "bookmark" in time, a snapshot of critical registry settings, system info and program files from a particular date.

If your computer is acting wonky, you can use these restore points to return Windows XP and Vista to a previous state when your computer was functioning correctly. It won't delete newly created files, though, such as documents, photos, songs, or emails.

So long as you're the "administrator" on your computer, you can create a System Restore bookmark or revert to a saved System Restore point. Here's how:

1. From your desktop, click on Start, then All Programs and Accessories. Now select System Tools, and finally, System Restore.

2. To create a System Restore point, click the link here that says "Open System Protection" and follow the prompts.

3. Otherwise, click “Restore my computer to an earlier time” (if it is not already selected) and then click Next. You will see a list of recent System Restore points. Choose one and select OK.