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Hello Team,
We have a software application based on Windows 11 24H2. Previously, when using the September 2025 Windows KB patch, the administrator account was configured with the default Windows theme and background settings, and the desktop background type was set to "Picture" by default.
After updating to the September 2026 Windows KB patch, we observed that the default background setting has changed to "Windows Spotlight" instead.
Could you please confirm whether this change is an expected behavior introduced by Microsoft as part of the Windows updates?
Regards,
Naveen
It has been previously reported with a large Windows update that the background setting may revert to Windows Spotlight as default, this is a bug that may occur with a large update, it does not indicate a problem with your system, and manually resetting the background to Picture should resolve the problem, are you unable to reset that setting to Picture?
There was no issue resetting the background setting back to Picture. However, we were unsure what might have changed during the update that caused this behavior in the first place.
Thank you for that information.
If you were able to reset the background to Picture, then there is nothing further you need to do, that was just the previously reported bug in a large updates, most likely this will not occur again on your system.
