Problem: After you logoff as a user under Windows 7, your monitor displays a black or blank screen. The computer is on, the monitor is on and nothing is in sleep mode, yet you cannot back in to your computer unless you reboot.
Solution: You probably need to update a graphics driver. If your computer vendor (such as HP, Dell, etc.) does not have a driver available for download, you may need to go to NVIDIA’s or ATI’s site, e.g., to find or detect the installed hardware on your system available for updates.
Once you have located the appropriate file, save it to your hard drive. Then run it to do the install.
Don’t forget to restart your system before testing to see if it solved your problem. After you reboot, log back in to one or more users. Then log out of one of them. If the problem is solved, your monitor will no longer display a permanent black screen, and you will be able to log on again as the same or a different user.
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