Hello @Atomatth
Screen Saver is Disabled.
I think I am making progress with this Issue of PlexHTPC being unresponsive in the Morning.
When I Switched On the AVR and TV This Morning, PlexHTPC was not Frozen and I was able to Resume Playback without Issue.
Obviously, working Once is not really proof that it is Fixed so I shall see how it is Tomorrow Morning.
I think I managed to resolve the Issue with the Screen being Resized to the Top Left Quarter of the Screen by following these Steps:
1 Open Registry Editor (as Admin) to the following path:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\GraphicsDrivers\Configuration\
2 Delete all entries in this Path.
3 Restart PC.
4 After Restart, re-open Registry Editor to:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\GraphicsDrivers\Configuration\
There should be one Registry entry.
Click on Tree Arrow, then Click on Second Arrow to View the Values.
By clicking on each 00 the values will be displayed on the right side of Registry Editor.
Note that there are some Value Pairs that match the Resolution of your Display.
5 Switch Off AVR and then Switch it On again.
6 Open Registry Editor to:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\GraphicsDrivers\Configuration\
There will now be a Second Entry.
This is a Dummy Monitor Entry created by Windows for when a Monitor is not present, i.e. when I Switch Off the AVR.
It has the same Value Pairs as before, but with incorrect Resolutions for the Display.
In my case the Values were for 1920 x 1080, hence why PlexHTPC was shrunk to a Quarter Screen as my Display is 3840 x 2160.
7 Change the values in the Dummy Monitor Registry Key to match the Real Monitor Resolution, i.e. 3840 x 2160 rather than 1920 x 1080..
8 Restart
I have not had the Issue with PlexHTPC being Shrunk to Quarter Screen Size since I made the above changes.
It has been frustrating trying to sort these Issues as my HTPC is nothing special with regards to Configuration:
PC > AVR > TV
Windows 11 Clean Install
Plex Server
Plex HTPC
Microsoft Office 365
Adobe Lightroom (Classic)
Adobe Photoshop
As stated above, I seem to have made some progress with PlexHTPC being unresponsive in the Morning so I will see how it is Tomorrow.
I also tracked down an Issue that seems to be related to .Net, Installing the Latest Version of .Net seems to have ‘Fixed’ that, however, it may be too early to be sure.
Thanks
Kevin