Description: A black desktop wallpaper that refuses to change after Windows 11 KB5120998 has a documented fix. Check affected 24H2/25H2 builds and update safely without resetting your PC.
If your desktop icons and taskbar still work but your wallpaper is solid black and will not change, Windows 11 KB5120998 may be responsible. Microsoft confirmed that some personalization settings failed to load after the August 27, 2026 preview update and marked the issue fixed by KB5124008 on September 8.[1][2]
Which Windows versions were affected?
Microsoft lists Windows 11 24H2 and 25H2, without restricting the issue to a particular laptop brand or GPU. The affected preview builds were 26100.9278 (24H2) and 26200.9278 (25H2). The corrective KB5124008 builds were 26100.9445 and 26200.9445, respectively. Later applicable updates also include the fix.[1][3]
The same settings-loading problem may affect slideshow backgrounds or contrast themes. It does not mean that your original photo was deleted.
Check the symptom before changing anything
A black background with visible desktop icons matches this report. A black screen after signing in where the taskbar and desktop never load points to a different startup or virtual-desktop problem. Do not treat these as the same failure.[1]
Safe steps to restore your wallpaper
- Press
Win + R, enterwinver, and note your Windows version and OS build. Open Settings → Windows Update → Update history to check for KB5120998 and later updates. The build and symptom together matter more than either alone. - Save your open work. In Windows Update, check for and install the latest applicable cumulative update, including KB5124008 or newer. On a managed PC, ask IT to deploy the approved update.[2][3]
- Restart if prompted. Right-click the desktop, select Personalize → Background, and choose Picture or Slideshow again. Keep the original image file intact.[4]
- If the background stays black on a corrected build, document the version, update history and exact symptoms. Check the source image and theme settings or contact Microsoft support; another cause may be involved.
Why choosing another picture did not help
Microsoft identified a failure to load desktop personalization settings, so the system displayed a default black background regardless of the selected value. This is an official software issue and fix, not a hands-on test performed for this article. Microsoft has not published a precise affected-device count in the cited notice.[1]
Avoid destructive fixes
Do not start by resetting Windows, deleting user profiles, editing the registry or clearing all wallpaper caches. Those actions can cost settings or files without addressing the documented fix. Uninstalling updates can also remove security protections. Note that Windows 11 24H2 Home and Pro reached end of support on October 13, 2026; plan a supported-version upgrade where relevant.[1]
Bottom line
For a black wallpaper that refuses to change after KB5120998, check your build and install KB5124008 or a later applicable update. Restore the wallpaper from Personalization afterward; reserve deeper troubleshooting for symptoms that persist on a corrected build.
References (1)
[1] https://support.microsoft.com/en-us/servicing/os/windows-11/2026/08/kb5120998-windows-11-24h2-25h2-update [2] https://learn.microsoft.com/en-us/windows/release-health/resolved-issues-windows-11-24h2 [3] https://support.microsoft.com/en-gb/servicing/os/windows-11/2026/09/kb5124008-windows-11-24h2-25h2-security-update [4] https://support.microsoft.com/en-us/windows/experience/personalization/change-the-desktop-background-in-windows [5] https://www.bleepingcomputer.com/news/microsoft/microsoft-fixes-bug-that-wiped-windows-desktop-settings/
