Windows Update Patch Resolves Desktop Settings Loss Issue
Microsoft's September 2026 Patch Tuesday updates address a known issue where desktop settings, including wallpaper and theme, were reset after installing the August preview update KB5120998. The bug also prevented users from restoring custom settings and affected mouse settings. The fix is included in the latest updates.
The issue specifically impacts Windows 11 versions 24H2 and 25H2 following the installation of the August preview update KB5120998. Affected machines display a solid black desktop background, and manual attempts to revert to prior configurations prove ineffective because the system fails to load saved settings regardless of their stored values.
Although KB5120998 is an optional release requiring a manual download prompt, it could install automatically for users who enabled the "Get the latest updates as soon as they're available" feature. The corrective action is embedded within the September 2026 Patch Tuesday updates, which Microsoft states resolves the settings-loading failure and the associated mouse configuration resets.
For affected Windows 11 users, this bug could lead to significant frustration and a temporary loss of personalization, as custom themes and mouse preferences may be unexpectedly wiped out. Individuals relying on specific accessibility or ergonomic mouse configurations might face workflow disruptions until the September patch is applied. While the fix is now available, the incident may prompt some users to reconsider enabling automatic preview updates, highlighting the trade-off between early feature access and system stability.