1.    31 Jul 2015 #1
    Join Date : Jul 2015
    Posts : 18
    Windows 10

    Tutorial: How to change Windows 10 "default" resolution

    I have stumble upon a strange problem when my Monitor is off, Windows back to default 1024x768 resolution, when i turn on the monitor, resolution is OK, but windows positions and sizes are messed up from the previous resolution.

    This is happening because some monitors power off completely and don't send signal to the PC so Windows is changing to "simulated" monitor with the default resolution of 1024x768 pixels.

    While there is some fixes for older Windows versions, nothing have seems to work for Windows 10. So here is a tutorial on how to change the default 1024x768 resolution in Windows 10:

    1. Open "Regedit" and navigate to "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\GraphicsDrivers\Configuration\SIMULATED_10DE_13 C2_00000001_00000000_1300^6C7185C1F893FF6C2863DDD8BF5E4ABF\00"

    2. Change the "PrimSurfSize.cx" and "PrimSurfSize.cy" to your desired values of resolution. Note that it must be changed in "demicial"

    3. Then go to the second "00" and change "DwmClipBox.bottom" and "DwmClipBox.right", "PrimSurfSize.cx" and "PrimSurfSize.cy", "ActiveSize.cy" and "ActiveSize.cx"

    4. That's it, now your windows sizes and positions won't bug when you turn off the monitor.

    For more details you can read this topic at: Windows 7 movesresizes windows on monitor power cycle - Microsoft Community
      My System SpecsSystem Spec

  2.    23 Aug 2015 #2
    Join Date : Aug 2015
    Posts : 14
    Windows 10 64bit Home

    Wow, Navuho, i had the same problem and it was driving me mad. I'm totally anal about my window positions. Glad i found this thread - you saved me from much anger, my friend.
      My System SpecsSystem Spec

  3.    2 Weeks Ago #3
    Join Date : Oct 2016
    Posts : 1

    I'm experiencing this common issue, but seem to have an uncommon looking registry. I've only ever installed one monitor (Dell P2715Q) yet my HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\GraphicsDrivers\Configuration looks like this:

    DEL40BDV7WP956B736L_18_07DF_D4+SIMULATED_8086_0412_00000000_00020000_10101^5B695E95157B3E316D788E013 2977D1B
    DEL40BDV7WP956B736L_18_07DF_D4+SIMULATED_8086_0412_00000000_00020000_1010100^C96209F0BD71F374E60367A 00065A913

    Which do I edit? Thanks for letting me wake this thread from the dead.
      My System SpecsSystem Spec


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