GoKawiilMicrosoft confirms KB5120998 mouse reset bug hits only non-English Windows 11 PCs
Microsoft has clarified that a mouse personalization reset bug tied to the August 2026 preview update KB5120998 only impacts Windows 11 devices set to non-English locales. The company found that certain code components fail to load correctly on these systems, causing cursor and animation settings to revert to defaults instead of user preferences. The update, which also brings Start menu and taskbar changes, is optional and only installs automatically if users have enabled the setting to receive updates as soon as they're available.
GoKawiil's interpretation of the reporting above, not reported fact.
Localization-specific bugs like this highlight how software quality can vary significantly across language markets, often receiving less testing attention than English-language builds. This is part of a pattern of recent Windows update issues affecting mouse functionality, suggesting ongoing quality control challenges in Microsoft's update pipeline for peripheral device settings.
- KB5120998 only resets mouse personalization settings on non-English Windows 11 installations, not English ones.
- Microsoft traced the bug to code components that fail to load properly in non-English locales, defaulting settings instead.
- This follows other recent mouse-related bugs Microsoft has had to fix, including a WinRE USB mouse/keyboard failure in October.
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Published there as: “Microsoft: KB5120998 mouse reset bug affects only non-English PCs”
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