The excitement surrounding the new features of update KB5120998 has been dampened by a series of UI bugs affecting Windows 11. While the patch, released on August 27, introduced highly anticipated enhancements such as a movable taskbar and a resizable Start menu, many users are experiencing critical regressions that hinder system usability.

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Cursor bugs and visual regressions

Microsoft has officially acknowledged an issue regarding mouse cursor personalization. According to the Windows Release Health documentation, installing the patch triggers an automatic reset of cursor settings, reverting them to defaults. This manifests as high-DPI cursors being replaced by oversized white ones, or in some cases, the cursor disappearing entirely. Users report that attempts to restore previous customizations are unsuccessful.

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Beyond the cursor, reports from Microsoft's Feedback Hub and Windows Latest indicate that the update can reset the desktop wallpaper to a black screen and cause fonts to appear blurry on certain systems. These visual instabilities follow a pattern of recent Windows 11 volatility, including previous patches that caused gaming crashes and issues with BitLocker.

The solution: manual uninstallation

Since this is a preview (optional) update rather than a mandatory Patch Tuesday rollout, Microsoft has stated that uninstallation is the only immediate fix. Affected users can remove the package by navigating to Settings $\rightarrow$ Windows Update $\rightarrow$ Update History $\rightarrow$ Uninstall updates. Users should look for and remove the entry labeled "2026-08 Preview Update (KB5120998) (26200.9278)".

Microsoft is currently investigating the root cause of the glitch. As this release serves as a preview for the September Patch Tuesday, the company has until September 8 to implement the necessary fixes before the general rollout.