Windows 11 26H2 Missing System Tray Icons: Fix by Uninstalling KB5121794

Windows 11 26H2 · Troubleshooting · First-hand report · October 10, 2026

Windows 11 26H2 system tray icons disappeared after a restart on my laptop. The applications were still running, including network services, but their notification area icons were missing. On October 10, 2026, I confirmed that uninstalling update KB5121794 restored all the missing icons. Here is what failed, what worked, and the exact rollback command.

Windows 11 26H2 tray icon issues appeared on my laptop a couple of days after I installed the feature update. I restarted Windows and noticed that only a few icons remained visible near the clock. Several application icons had vanished from the system tray.

Windows 11 notification area icons were missing even though the affected programs were still listed in Task Manager and continued to do their jobs. Some of these applications maintained important network connections, so terminating or restarting their processes was not an acceptable troubleshooting step.

October 10, 2026: This was a real, reproducible issue on my Windows 11 26H2 installation at the time of writing. It does not mean that every PC running this update is affected.

1. Restarting Windows. Two additional reboots did not bring the missing tray icons back.
2. Restarting Windows Explorer (explorer.exe). The taskbar reloaded, but the invisible application icons stayed missing.
3. Changing system tray visibility settings. I checked Settings → Personalization → Taskbar → Other system tray icons. Forcing the icons to appear through the standard Windows 11 interface did not fix the problem.
4. Refreshing the notification area icon cache and registration. Cache and visibility adjustments, along with a TaskbarCreated notification, did not restore the missing icons.

Windows 11 26H2 icons were still missing after all of these attempts, even though the programs themselves were healthy and running.

Windows 11 version check: Press Win + R, type the following command, and press Enter:

winver

Windows 11 build number: To check the exact build, I opened PowerShell and ran:

Get-ItemProperty 'HKLM:\SOFTWARE\Microsoft\Windows NT\CurrentVersion' | Select-Object DisplayVersion, CurrentBuild, UBR

Windows 11 update history: I checked the latest installed KB updates with:

Get-HotFix | Sort-Object InstalledOn -Descending | Select-Object -First 10 HotFixID, InstalledOn | Format-Table -AutoSize

KB5121794 is the Windows 11 26H2 enablement package, according to Microsoft's documentation. Windows 11 versions 24H2, 25H2, and 26H2 share the same core operating system; the enablement package activates the 26H2 features. I therefore decided to remove that package and return to the previous Windows version.

Windows 11 26H2 rollback fixed the missing system tray icons on my laptop. These are the steps I followed:

1. Open the Start menu, search for Command Prompt, and choose Run as administrator.
2. Run the Windows Update Standalone Installer uninstall command below:

wusa.exe /uninstall /kb:5121794

1. Confirm the update removal if Windows prompts you to do so, and wait for the process to finish.
2. Restart the computer and check the notification area next to the clock.

Windows 11 26H2 was the relevant change on my laptop: The icons disappeared after the feature update and returned after I removed the 26H2 enablement package. This strongly links my particular failure to the 26H2 transition or a feature activated by it.

Windows 11 26H2 system tray bug reports should still be distinguished from an officially confirmed Microsoft issue: my successful rollback is a first-hand troubleshooting result, not proof that every 26H2 installation has the same defect. Microsoft's Windows 11 26H2 release health page is the place to check for officially documented problems and updates.

Windows 11 26H2 automatic reinstallation: After rolling back, consider temporarily pausing updates under Settings → Windows Update while you check for a subsequent fix. Avoid blocking security updates indefinitely.

On my laptop, the icons stopped appearing after the 26H2 feature update even though the affected programs continued running. Removing KB5121794 restored the icons. Other computers may have different causes.

Not in my case. Restarting Windows Explorer refreshed the taskbar but did not restore the missing icons.

If KB5121794 is installed and Windows permits its removal, open an elevated Command Prompt and run wusa.exe /uninstall /kb:5121794. Restart when required. Back up important work and check that this KB matches your installation first.

Official Microsoft documentation: KB5121794: Feature update to Windows 11, version 26H2 by using an enablement package.