Microsoft Confirms Windows 11 Update Erases Custom Mouse Settings
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REDMOND, Wash. — Microsoft confirmed Monday that a recent software update for Windows 11 is resetting mouse configurations and preventing users from restoring their previous customizations. The issue affects the KB5120998 patch, which was deployed globally to Windows 11 systems earlier this month.
The company acknowledged the problem in an official statement released on August 31, 2026, marking the first time the tech giant has publicly admitted the defect. The update, intended to address security vulnerabilities and improve system stability, inadvertently triggers a reset of mouse pointer speed, acceleration settings, and button assignments. More critically, users report that the operating system blocks attempts to revert these changes to prior states, leaving many unable to restore their preferred configurations.
Affected users describe a sudden loss of personalized settings immediately following the installation of the patch. Attempts to manually reconfigure the mouse through the standard Windows Settings menu or Control Panel often result in the system reverting to default parameters upon restart. The disruption has impacted a wide range of users, from casual home computer owners to professionals relying on specific peripheral configurations for productivity and gaming.
Microsoft stated that engineers are actively investigating the root cause of the malfunction. While the company confirmed the existence of the bug, it has not yet identified why the update is overriding user preferences or blocking restoration protocols. The reason behind the technical failure remains unknown as of Monday morning.
The issue has sparked concern among system administrators and enterprise users who manage large fleets of devices. Without a clear timeline for a fix, organizations face potential workflow interruptions as employees struggle with unresponsive or misconfigured input devices. Microsoft has not announced an immediate rollback plan or a specific date for a corrective patch.
Users are currently advised to avoid reinstalling the update if possible, though many systems have already received the patch automatically through Windows Update services. For those affected, workarounds remain limited. Some users have reported temporary success by connecting different peripheral hardware or utilizing third-party configuration software, but these solutions are not universal and do not address the underlying system error.
As the investigation continues, Microsoft has urged patience while its teams work to develop a permanent solution. The company has not provided details on whether the issue stems from a coding error in the update itself or an interaction with specific hardware drivers. Until further notice, the inability to restore custom mouse settings remains a persistent obstacle for millions of Windows 11 users worldwide.
Developments regarding the scope of the impact and the timeline for a resolution are expected as Microsoft continues its internal review.