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Microsoft says KB5120998 Windows update resets desktop settings
BleepingComputer • • technology
Key Points:
- Microsoft confirmed that the KB5120998 August 2026 preview update causes some Windows 11 devices to lose or reset desktop settings, including wallpaper, desktop themes, and other customization options.
- The issue affects systems running Windows 11 24H2 and 25H2, leading to a solid black background and preventing users from restoring their custom desktop settings.
- The update also impacts mouse settings, resetting them and making it impossible for users to revert to previous configurations.
- KB5120998, released on August 27, 2026, includes Start menu, taskbar, and Windows search improvements but is an optional, non-security update that may install automatically if users have enabled automatic updates.
- Microsoft acknowledged the problem in a Windows release health update and advised users that manual restoration of settings on affected devices will not work due to the bug.
