If you have a problem starting Windows, you can use one of several startup options to help you start Windows in a safe environment with basic files and drivers where you can restore settings and fix the problem. Safe Mode is a good place to start. If a problem does not occur when you start in Safe Mode, you can eliminate basic Windows files and drivers as possible causes of the problem. If you added a device or changed driver, you can use Safe Mode to remove the device or restore the changed driver, or you can use Choosing Last Known Good Configuration to restore settings saved when your computer was last shut down properly.
Start Windows When Problems Occur