Windows 11 Update Causes Unexpected Mouse Configuration Resets

Technical Glitches in Peripheral Customization

Microsoft has officially acknowledged a technical glitch affecting Windows 11 users who installed the KB5120998 preview update. Released in late August 2026, this non-security patch is causing mouse settings to revert to default configurations. Many users report that their custom cursor preferences and sensitivity adjustments are being wiped or altered automatically.

The issue stems from the latest optional preview update, which was intended to improve system performance. Instead, it has disrupted personalization settings for numerous individuals. Once the update is applied, the operating system ignores existing user configurations, forcing hardware behavior back to its factory state.

Users have flooded support forums with complaints regarding the loss of their personalized mouse setups. The update specifically targets cursor personalization, causing frustration for those who rely on specific pointer speeds or unique visual schemes. Microsoft engineers are currently investigating the root cause of this configuration rollback.

Will a Future Patch Resolve the Mouse Conflict?

While the update was meant to be a routine enhancement, it has clearly introduced an unintended software conflict. The issue appears widespread across various hardware configurations, suggesting a core flaw within the update package itself. Affected users must manually reconfigure their preferences until a permanent fix is issued.

Microsoft has not yet provided a specific timeline for a corrective patch to address these settings resets. For now, users who value their custom mouse profiles may want to delay installing optional preview updates. The company is expected to bundle a fix in an upcoming mandatory security release.

Frequently Asked Questions

Until then, those impacted must endure the inconvenience of resetting their mouse preferences after each reboot. This incident serves as a reminder of the risks associated with installing non-essential system previews. Vigilance remains necessary when applying updates that have not yet undergone full stability testing.

What should I do if my mouse settings keep resetting? You should manually reconfigure your settings for now. Unfortunately, there is no permanent fix available until Microsoft releases an official update to address the bug.

Is the KB5120998 update mandatory for my computer? No, this is a non-security preview update. You can choose to skip or uninstall it if you want to avoid potential issues with your mouse configurations.