Switch User/Log Off Black Screen in Windows 7 RRS feed

  • Question

  • This started this morning after waking up.  Trying to lock the system (Windows key + L) or switching users goes to a black screen with the mouse showing. No amount of time seems to correct the issue.  This is not a new PC or a new install of Windows 7. I've had the PC for years and this install for months without this issue.

    Possible related issue, the onboard sound card seems to have died a few days ago.  The OS recognizes when a jack is plugged in and when it's removed, however no sound is produced.  This goes for all audio jacks on the board even if I tell the OS to turn the jack into a rear audio port.

    Tuesday, February 25, 2014 4:34 PM


  • Hi,

    You might get some benefit from running powercfg -energy. This can tell you if there is something causing power management issues.

    This should also be a driver issue. Did you install Windows 7 compatible driver? Ensure drivers are up to date (including video driver and graphic driver), as well as ensure that you're using the latest BIOS. 

    In addition, I suggest you temporary uninstall the anti-virus. If the issue still occurs, disable all startup items and third party services when booting. This method will help us determine if this issue is caused by a loading program or service. Please perform the following steps:

    1. Click the Start Button type "msconfig" (without quotation marks) in the Start Search box, and then press Enter.

    Note: If prompted, please click Continue on the User Account Control (UAC) window.
    2. Click the "Services" tab, check the "Hide All Microsoft Services" box and click "Disable All" (if it is not gray).
    3. Click the "Startup" tab, click "Disable All" and click "OK".

    Then, restart the computer. When the "System Configuration Utility" window appears, please check the "Don't show this message or launch the System Configuration Utility when Windows starts" box and click OK.

    Please test this issue in the Clean Boot environment, if the issue disappears in the Clean Boot:

    How to perform a clean boot to troubleshoot a problem in Windows 8, Windows 7, or Windows Vista


    However if the issue reoccurs in Clean Boot Mode, you may uninstall the driver and do not install it yet, then log off and check if the issue occurs.

    Hope it helps.


    Blair Deng

    Blair Deng
    TechNet Community Support

    • Marked as answer by Cloud_TS Monday, March 10, 2014 6:11 AM
    Wednesday, February 26, 2014 8:30 AM