Microsoft: KB5120998 mouse reset bug affects only non-English PCs
Description
A known issue in the Microsoft KB5120998 August 2026 preview update causes mouse settings to revert after installation, but this problem only affects non-English Windows 11 systems. Microsoft has acknowledged the issue and clarified its limited scope. There is no indication that this issue is a security vulnerability or that it leads to exploitation. The problem is specific to user experience with mouse configuration on certain localized versions of Windows 11.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The KB5120998 preview update released by Microsoft in August 2026 includes a bug that resets mouse settings after installation, but this issue is confined to non-English Windows 11 PCs. Microsoft has publicly stated that English-language systems are not affected. This is a known issue related to system settings rather than a security vulnerability. No exploits or malicious activity have been reported in connection with this bug.
Potential Impact
The impact is limited to user inconvenience due to mouse settings reverting to defaults on non-English Windows 11 systems after applying the KB5120998 update. There is no evidence of security compromise or data loss associated with this issue.
Defensive Guidance
Microsoft has identified the issue and limited its scope to non-English systems. Since this is a known issue with a preview update, users may choose to delay installing the update until a fix is released. Monitor official Microsoft channels for updates or patches addressing this problem. No urgent security action is required.
Technical Details
- Classification
- {"confidence":0.3,"severitySource":"default","classifier":"rss-v2"}
- Article Source
- {"url":"https://www.bleepingcomputer.com/news/microsoft/microsoft-kb5120998-mouse-reset-bug-affects-only-non-english-pcs/","fetched":true,"fetchedAt":"2026-09-03T15:37:38.223Z","wordCount":632}
Threat ID: 6a999443acd9273b491fdca0
Added to database: 09/03/2026, 15:37:39 UTC
Last enriched: 09/07/2026, 19:11:37 UTC
Last updated: 10/04/2026, 08:00:29 UTC
Views: 81
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