Advanced WindowsCare Personal is a comprehensive PC care utility that can be characterized by a “one-click approach” to the tasks of protecting, repairing, and general optimizing of your computer. Software will perform the following operations with your PC:
* Removing Spyware and Adware modules, running on your PC.
* Preventing potential Security Threats, altering appropriate settings.
* Privacy Protection.
* Fixing Registry Errors, and optimizing registry.
* Cleaning temporary files and orphans.
* Cleaning startup options, removing unnecessary applications from initializing.
* Repairing Windows operating system.
* Speeding up operating system and optimizing RAM use.
I would not say, that the program is the most effective on the market, but it is definitely one of the most easiest, if not the easiest, to control and operate. If you run into trouble, the Restoration option can return your system to its original configuration.
Software is absolutely free and designed for Windows Vista, XP and 2000.
http://www.iobit.com/advancedwindowscareper.html

A very brief half-minute video tutorial will show you the software operation:

Advanced WindowsCare Personal in 30 seconds