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Microsoft: KB5120998 mouse reset bug affects only non-English PCs
September 3, 2026 · BleepingComputer · Severity: MEDIUM
Microsoft says a known issue that reverts mouse settings after installing the KB5120998 August 2026 preview update affects only non-English Windows 11 systems.
Key Takeaways
- Microsoft confirmed KB5120998 causes a mouse reset bug affecting only non-English Windows PC configurations.
- The patch introduced a regression that resets mouse settings to defaults after system updates.
- Microsoft is working on a fix for the issue affecting localized Windows installations.