The optional Windows 11 KB5120998 update released by Microsoft has brought unexpected technical problems for operating system users. This update is causing significant flaws, particularly in mouse cursor and desktop wallpaper settings.

The update aimed to make significant changes to Windows 11’s taskbar, start menu, and search functions. However, after its installation, many users encountered various performance and display errors on their systems.

Technical Problems Experienced After the Update

Reports from users indicate that problems related to the mouse cursor are quite widespread. Many users who have applied the update report that the cursor has either disappeared completely or become unusually large.

In some cases, the cursor shrinks to a much smaller size than it should, negatively impacting the user experience. Additionally, it has been reported that personalized mouse settings revert to default values, and color and size preferences are not preserved.

Microsoft officially acknowledged this issue in its release notes. The company confirmed that after the KB5120998 update released on August 27, 2026, the mouse cursor personalization settings reverted to standard settings.

The problems are not limited to the mouse cursor and also affect desktop wallpapers. Users report that after changing the wallpaper and restarting the system, they encounter a black screen.

Removing the Update is Recommended for Solution

Tests show that both mouse cursor and wallpaper errors are resolved by removing the update in question from the system. Microsoft is expected to release a new patch in the coming days to fix these bugs.

For now, users affected by these problems are advised to remove the KB5120998 update from their computers. This process helps to eliminate the bugs by reverting the system to the previous stable version.

It is being discussed in technology circles that Microsoft should be more careful with these types of optional updates. Users emphasize that these types of errors, which directly affect system stability, can be prevented with more comprehensive testing processes.

Did you also encounter a problem after installing the Windows 11 KB5120998 update?