CCleaner (Crap Cleaner) is a System Optimization tool that removes unused and temporary files allowing Windows to run faster and more efficiently I use CCleaner at least once a day to clean up the temporary files and cookies on my PC. You can also use CCleaner to clean up your computer’s registry. CCleaner won’t delete or change any registry entries until you click the Fix Issues button. Before it fixes the registry issues CCleaner will prompt you to backup your registry which is recommended. Download CCleaner Here.