Windows 11 September Patch Resolves Mouse Personalization Glitch
Microsoft has confirmed that the September 2026 cumulative update (KB5124008) resolves a bug that reset mouse cursor and animation settings on Windows 11 systems. The issue, introduced by the optional August preview update KB5120998, affected non-English installations where settings failed to load and reverted to defaults. Users are advised to install the latest security update to apply the fix.
The glitch specifically targeted non-English installations of Windows 11 versions 24H2 and 25H2. The faulty preview update was optional, though it could auto-install if users enabled the "Get the latest updates" toggle. Uninstalling the problematic update failed to restore the lost cursor and animation preferences.
The September cumulative update (KB5124008) resolved the issue, and Microsoft recommended installing it. This same patch also fixed a separate bug that wiped custom desktop settings. Microsoft has recently addressed other mouse-related problems, including an emergency fix for WinRE USB devices and an ongoing investigation into a disappearing pointer in classic Outlook.
This incident could affect non-English-speaking Windows users who depend on customized cursor settings for accessibility or productivity, potentially disrupting their daily workflows. The optional nature of the faulty update may lead some users to hesitate before installing future preview patches, eroding confidence in Microsoft's update testing process. However, the swift resolution in the cumulative update may limit the overall impact, though it underscores the importance of cautious patch management for enterprise environments.