Use Device Manager to roll back the video driver.Revert the system to a restore point prior to installing video driver.ExplanationTo roll back to a previous driver, access Device Manager and then use the Roll Back Driver option available in the video driver's properties. You may need to boot the system into Safe Mode first if the problem is serious enough to make the display difficult to see. Alternatively, you could also revert the system to a prior restore point that was created before the problematic driver was installed.You should not disable the driver in this situation. The Last Known Good configuration boot option is only available on Windows 7 and earlier systems. Even if it were available, it would not work in this scenario because the system has been rebooted and the user has logged in since the change was made. Running a startup repair would not correct a problem with an erratic video driver.