Registry Fixing: This is the most important tip to improve your computer’s speed. The installation or un-installation of any program in your computer tends to develop changes in the Windows registry, which is responsible for controlling the overall behavior on your system. When these changes are handled inappropriately, they affect the speed of your computer. Thus, a registry cleaner program, by scanning the registry of your computer fixes all the existing as well as potential issues making your computer run in a great speed.