Disk Cleanup is a tool to clean up your disk from any unwanted file. Disk Cleanup help your PC o run faster and smooth. But normally when you want to access the Disk Cleanup tool, you usually have to either find it through the start menu, or open up the drive properties window. Instead of going through all that, we can use a simple registry hack to add a menu item to the drive right-click menu. So now you only simply right click and choose Disk Cleanup. Follow this HOW-TO.