Microsoft says the September 2026 Patch Tuesday updates fix a bug that caused some Windows 11 devices to lose desktop settings and display a black wallpaper after installing KB5120998. The company confirmed the issue also affected mouse settings and advised users to install KB5124008 or later to resolve it. #Microsoft #Windows11 #KB5120998 #KB5124008
Keypoints
- The bug affected Windows 11 24H2 and 25H2 devices after KB5120998.
- Desktop backgrounds could reset to a solid black color.
- Manual restoration of customized desktop settings did not work.
- Mouse settings were also changed or reset by the update.
- Microsoft fixed the issue in KB5124008 and later updates.