Use the last known good configuration. Sometimes, after installing a graphics card driver, you’ll be unable to boot into Windows. Restart your computer and, as the computer boots, repeatedly press the F8 key until you see the Windows Advanced Options Menu. Use the arrow key to highlight the Last Known Good Configuration option and then press ENTER.
Use a system restore point. Restart your computer and, as the computer boots, repeatedly press the F8 key until you see the Windows Advanced Options Menu. Use the arrow key to highlight the Safe Mode option and then press ENTER.
Log on to your computer as you normally would.
Before you see the Windows Desktop, you’ll see the Windows Is Running In Safe Mode pop-up. Click No.
In the System Restore dialog box, make sure the Restore My Computer To An Earlier Time radio button is enabled and click Next. Select a Restore Point from the calendar on the left, particularly one that was saved prior to when you first encountered the problem, and then click Next. Click Next to restore your computer.