Windows 8 and 8.1 Forums


Monitor goes black and login screen appears

  1. #1


    Posts : 32
    Windows 8.1 Pro x64

    Monitor goes black and login screen appears


    Sometimes my monitor goes black for a second, sometimes 3-4 times, and then it locks the screen.
    What could cause this?
    Can this be related to security?
    I have a turn monitor off shortcut, created with nircmd. Can it be related to that?
    (No, it doesn’t happen when I use the shortcut, it is on the desktop. It happens, when I turn the mouse wheel sometimes).
    Thanks.

      My System SpecsSystem Spec

  2. #2


    Posts : 1,883
    7601.18247.x86fre.win7sp1


    What do you mean by "locks the screen?"

    Does the lock screen come on or does the machine freeze (or just become unusable) and you need to hard reboot it?

    Sounds like it could be a TDR issue, but we'll see about your response.
      My System SpecsSystem Spec

  3. #3


    Posts : 32
    Windows 8.1 Pro x64


    Lock screen comes on. I type the password and go on from where I left.
      My System SpecsSystem Spec

  4. #4


    Posts : 1,883
    7601.18247.x86fre.win7sp1


    Wow, yeah that is unusual for sure, when actually using the machine actively.

    Yes, I would suggest to uninstall nircmd and remove the desktop shortcut, to test.
      My System SpecsSystem Spec

  5. #5


    Posts : 32
    Windows 8.1 Pro x64


    NirCMD is copied into the Windows Directory. I am guessing it is just one file. I will delete the shortcut, and post the result in a couple of days. If that doesn’t help, I will delete nircmd from windows directory (Hope it is the way to uninstall it, cause I have no clue.)
      My System SpecsSystem Spec

  6. #6


    Posts : 32
    Windows 8.1 Pro x64


    So far it helped. Just removing the shortcut. I guessed that was it. Thanks.
      My System SpecsSystem Spec

Monitor goes black and login screen appears
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