If the Windows Startup Repair tool does not start on its own, it usually indicates that the problem is severe. You can start the repair tool yourself by either accessing it through the “Systems Recovery Options” menu on the computer hard disk or by using the Windows Installation disc. If you are using a laptop or a mobile device that has a touchscreen, it may be necessary to plug in an external mouse and keyboard in order to access the Windows Startup Repair tool when accessing it through the “Systems Recovery Options” menu.