In late August, a voluntary update for Windows 11 caused unexpected issues with personalization settings. Users found that their wallpaper, mouse pointer styles, and other preferences were not functioning as intended after installing the update. The problem was introduced by the optional update KB5120998, which was released on August 27. Microsoft acknowledged these issues and has since provided a fix through its latest security update. The bug affected users of Windows 11 versions 24H2 and 25H2. After installing KB5120998, some users noticed their desktop wallpaper was replaced with a plain black background, and changing it back had no effect. The system failed to recognize and apply the saved settings, regardless of the wallpaper selected. This issue also impacted slideshow settings and contrast themes, making the user experience less customizable. Another issue related to the same update affected users whose Windows installations were set to a language other than English. In these cases, the mouse pointer’s style, color, or animation would revert to default settings, and users could not permanently restore their preferred settings. This problem highlighted the complexity of handling multiple language configurations in software updates. Microsoft has released a new update, KB5124008, to fix these issues. Available since September 8, this update is part of a major security update that addresses 974 vulnerabilities across Microsoft's products, with 723 of those specifically for Windows. Users affected by the personalization issues are encouraged to install this update to restore their system settings and ensure their systems remain secure.