Hi,
I had already created an identical post but they told me to create a new one.
I have a problem with "Load specific theme" policy in Windows 10 20H2 and 21H1 Enteprise.
I created a .theme file and inserted the path into the policy but, after the first login of an user, the theme is applied but accent color is not correctly in some areas, for example in background of the windows security page (the CTRL+ALT+CANC page, with Lock, Taskmanager, Reboot buttons), it remains the default blue color.
Theme is correctly applied as expected (in the Settings page it appears as applied and the selected accent color is correct), indeed other elements (for example start logo, settings page backgrounds) have the correct accent color.
If with the user I manually open the Settings page, select an other color and again my accent color with the mouse or manually set the theme with double click, the custom accent color is instead applied correctly.
I noticed that If I open only the .theme file with a double click, the color continues not to be applied, I can only get it to work if I first select the theme in the Settings page and then I open again my .theme file.
The interesting thing is that, even if I set the policy to prevent the modification of the theme (but I leave the display of the themes menu in Settings page), if I still double click on the name of the theme, the color is applied correctly (so even if the selection of the theme is theoretically disabled by policy!).
Once the color is successfully applied via the Themes page of Settings, the problem no longer occurs with that specific user profile, even after deleting the local profile folder to have the policy reapplied...i think it's a strange cache problem.
To reproduce the bug I must therefore completely eliminate the user and create a new one with a different SID.
Obviously I have already tried with other clean images of Windows, the problem can always be reproduced in the same way by creating a simple new theme file that only changes the accent color with any color other than the default blue.
"Prevent changing color scheme" and "Prevent changing color and apparence" are disabled for testing, but the problem is the same with these policies enabled.
Thanks in advance for any replies


