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

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.

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:

Code:

DEL40BDV7WP956B736L_18_07DF_D4^3E1BBFAD2D2BBBE8EB5038006175E214
DEL40BDV7WP956B736L_18_07DF_D4+SIMULATED_8086_0412_00000000_00020000_10101^5B695E95157B3E316D788E0132977D1B
DEL40BDV7WP956B736L_18_07DF_D4+SIMULATED_8086_0412_00000000_00020000_1010100^C96209F0BD71F374E60367A00065A913
MSBDD_LGD02D80_00_07DA_84_8086_0126_00000000_00020000_0^C9257F7727FF42D1856F4CC7AD14E249
MSBDD_NOEDID_8086_0412_00000000_00020000_0^B878EC6511B7FF6F798A951FDBC58C6E
MSH062E0_00_07DB_C6^182FDC0875F0A76803E4A9848A8C1EA7
MSNILDEL40BDV7WP956B736L_18_07DF_D4_1414_008D_FFFFFFFF_FFFFFFFF_0^5EE5FF374E23BFC5B626E1C7ECEDA6BF
MSNILNOEDID_1414_008D_FFFFFFFF_FFFFFFFF_0^030B4FCE00727AC1593E5B6FD18648D6
NOEDID_8086_0412_00000000_00020000_1010100^E68BD8849E45F4596BC57FB33F16C596
SIMULATED_8086_0412_00000000_00020000_10101^7C3565F513628868817E7771EE340E58
SIMULATED_8086_0412_00000000_00020000_1010100^9DC0F72234047B2D0046209C40C68EB2
SIMULATED_8086_0412_00000000_00020000_30E03^F934C7E92A21D6DD00CCE41AA27AFF48

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

rushbikes said:

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:

Code:

DEL40BDV7WP956B736L_18_07DF_D4^3E1BBFAD2D2BBBE8EB5038006175E214
DEL40BDV7WP956B736L_18_07DF_D4+SIMULATED_8086_0412_00000000_00020000_10101^5B695E95157B3E316D788E0132977D1B
DEL40BDV7WP956B736L_18_07DF_D4+SIMULATED_8086_0412_00000000_00020000_1010100^C96209F0BD71F374E60367A00065A913
MSBDD_LGD02D80_00_07DA_84_8086_0126_00000000_00020000_0^C9257F7727FF42D1856F4CC7AD14E249
MSBDD_NOEDID_8086_0412_00000000_00020000_0^B878EC6511B7FF6F798A951FDBC58C6E
MSH062E0_00_07DB_C6^182FDC0875F0A76803E4A9848A8C1EA7
MSNILDEL40BDV7WP956B736L_18_07DF_D4_1414_008D_FFFFFFFF_FFFFFFFF_0^5EE5FF374E23BFC5B626E1C7ECEDA6BF
MSNILNOEDID_1414_008D_FFFFFFFF_FFFFFFFF_0^030B4FCE00727AC1593E5B6FD18648D6
NOEDID_8086_0412_00000000_00020000_1010100^E68BD8849E45F4596BC57FB33F16C596
SIMULATED_8086_0412_00000000_00020000_10101^7C3565F513628868817E7771EE340E58
SIMULATED_8086_0412_00000000_00020000_1010100^9DC0F72234047B2D0046209C40C68EB2
SIMULATED_8086_0412_00000000_00020000_30E03^F934C7E92A21D6DD00CCE41AA27AFF48

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

I've made an export of all the keys under configuration. Then I've disconnected my computer from the monitor and deleted all the settings. After re-attaching everything worked fine.