When all Windows are resized after your monitor have been power-recycled

monitorissues

Some monitors (especially hdmi/TV monitors) don't keep the hdmi port "alive" when they are powered down.

As a result, when windows reboots or comes out of sleep, it can't detect a monitor, so it sets resolution to it's "SIMULATED" monitor registry entry in the key at;
HKLM\SYSTEM\CurrentControlSet\Control\GraphicsDrivers\Configuration

This can be manually edited to contain the actual screen registration of your default monitor.

Change these keys:
Under each is a tree called "00" two of the keys are
PrimSurfSize.cx
PrimSurfSize.cy

Under "00" was another branch also called "00" two of the keys are;
ActiveSize.cx
ActiveSize.cy

On my 4k Monitor, I still have some resize/reposition issues, but not as bad as before registry hacking.

reference:
https://answers.microsoft.com/en-us/windows/forum/windows_7-hardware/windows-7-movesresizes-windows-on-monitor-power/1653aafb-848b-464a-8c69-1a68fbd106aa
http://social.technet.microsoft.com/Forums/windows/en-US/4d8f3aef-8c04-481b-a69a-ec0fbf3669c2/turning-off-display-resizes-open-windows


https://superuser.com/questions/267086/how-to-stop-windows-resizing-when-the-monitor-display-channel-is-turned-off-sw