A Critical Bug in Microsoft’s Latest Update Resets Desktop Settings for Thousands of Users
In a disturbing turn of events, thousands of Windows 11 users have been left with a black background on their desktops after installing the latest preview update, KB5120998. The issue, confirmed by Microsoft, affects systems running Windows 11 versions 24H2 and 25H2, causing not only wallpaper changes but also resetting various other desktop settings.
The bug is particularly concerning because it can affect a wide range of users who installed the optional, non-security update on their devices. According to Microsoft, users may have inadvertently triggered the reset by enabling the “Get the latest updates as soon as they’re available” option or by clicking the “Download and install” link for KB5120998.
In its release health update, Microsoft explained that the issue arises from a problem with loading desktop settings after installing the update. As a result, users may find themselves unable to restore their custom settings on affected devices. “It is possible other desktop settings may be affected, such as slideshow settings or contrast themes,” the company warned.
To make matters worse, this bug has not been an isolated incident. Microsoft has acknowledged that similar issues have occurred in the past, including a 2020 update that broke desktop wallpaper functionality and caused Windows 7 wallpapers to display blank black screens.
The KB5120998 update, which was released on August 27 with improvements for the Start menu, taskbar, and Windows search, also introduced another issue: resetting mouse settings. Microsoft acknowledged this problem just a day after releasing the update.
While the impact of these bugs may seem minor at first glance, they can have significant consequences for users who rely on custom desktop settings to stay productive. Furthermore, the fact that users must manually install this optional update raises concerns about user education and awareness around Windows updates.
So what does this mean for you? If you’re a Windows 11 user, take this opportunity to review your desktop settings and ensure that you have not inadvertently triggered the reset. Microsoft has confirmed that it is working on a fix for the issue, but in the meantime, users should be cautious when installing optional updates and monitor their devices closely for any signs of unusual behavior.
In an era where cybersecurity threats are increasingly sophisticated, it’s essential to stay vigilant about software updates and potential bugs. By staying informed and taking proactive steps to secure your device, you can minimize the risk of encountering issues like this one and keep your data safe.
Source: Bleeping Computer — 2026-09-03