A recent wave of problems affecting Windows users has finally been addressed by Microsoft, which has fixed a known issue that caused mouse settings to reset on some systems. The company has confirmed that its September updates, specifically KB5124008, resolve the bug that had been causing frustration for many.
The issue was first identified after the August 2026 preview update, KB5120998, was released. This optional update brought various improvements to Windows 11 versions 24H2 and 25H2, including changes to the Start menu, taskbar, and Windows search. However, as users reported, mouse cursor personalization settings were automatically changed or reset after installing this update, and even uninstalling KB5120998 from affected devices did not restore the original settings.
According to Microsoft, the problem lies in “code components” within non-English Windows installations, which cause settings load failures and default settings are used instead. The company explained that when users attempt to manually restore their mouse settings, they are unable to do so because the issue prevents these settings from loading regardless of their value.
It’s worth noting that while this bug was particularly problematic for non-English Windows installations, it’s possible that English-speaking users may also have been affected if they installed KB5120998. The optional nature of this update means that not all users will have received it automatically, but those who did click the “Download and install” link may be at risk.
Fortunately, Microsoft has now resolved the issue in its September updates, specifically KB5124008. Users are advised to update their devices with the latest security patch as soon as possible, which includes important improvements and resolutions, including this one. This is not the first time that Microsoft has addressed mouse-related problems on Windows devices – in recent months, it has released emergency updates to fix issues such as a bug causing the Windows Recovery Environment (WinRE) to be unusable due to disabled USB mice and keyboards.
While this particular issue may have been resolved, it serves as a reminder of the importance of staying up-to-date with the latest security patches. Users should make sure that their devices are configured to automatically receive updates, including optional ones like KB5120998, which can potentially bring about unwanted changes to system settings. By taking proactive steps to ensure device security and keeping software current, users can avoid falling victim to similar issues in the future.
Source: Bleeping Computer — 2026-09-10