Microsoft fixes bug that wiped Windows desktop settings
Microsoft's September 2026 Patch Tuesday (KB5124008) fixes a bug that reset desktop wallpapers and settings on Windows 11 24H2 and 25H2.
Microsoft said desktop settings failed to load after the optional KB5120998 August 2026 preview update on Windows 11 24H2 and 25H2, showing a solid black background and preventing restoration of customizations. The issue also changed or reset mouse settings and could install automatically when 'Get the latest updates as soon as they're available' is enabled. The KB5124008 cumulative update released September 8, 2026 resolves it; a similar wallpaper bug was fixed in February 2020 (KB4539602).
- KB5120998 preview update caused black desktop backgrounds and blocked restoring custom settings
- The issue also changed or reset mouse settings on affected Windows 11 devices
- Fixed in the September 8, 2026 KB5124008 update; a similar bug hit Windows 7 in 2020
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- · 5d agoMicrosoft fixes bug that wiped Windows desktop settings
BleepingComputer· 10
Microsoft's September 2026 Patch Tuesday (KB5124008) fixes a bug that reset desktop wallpapers and settings on Windows 11 24H2 and 25H2.
- · 5d agoMicrosoft says September updates fix mouse settings reset issues
Microsoft's September cumulative update KB5124008 fixes a Windows 11 bug where the August KB5120998 preview update reset mouse personalization settings.