If your computer is running abnormally slow or has unexpected error pop up windows, freeze issues, blue screen, unwanted pop ups, slow start up and system crashes after a period of use. It is time to try registry cleaner.You can use Perfectoptimizer reigstry cleaner scan your computer first to see if there are errors in your computer's registry, then make right decision. You only need a few clicks to get your PC speed back without risk to damage your PC and loose your money with the Perfectoptimizer registry cleaner.