Issue with KB5086672 (262200.8117)

Question

When I install the 2026-03 KB5086672 (262200.8117) update for Windows 11, the Start menu, Taskbar, Greetings, and more don't work, but when I uninstall it, everything works. I had to pause the update. Does anyone have this problem?

Answer 1

KB5086672 is an out-of-band update that Microsoft released to fix issues in the optional preview update (KB5079391) released on March 26th which is a beta version of the April update, neither updates are normal monthly updates and do not need to be installed.
If uninstalling the KB5086672 update resolved the problem, then the best option is to pause your updates until the official March update is released.

Below that update is a switch to 'Get the latest updates as soon as they are released', disable that option and restart your PC, that will stop the optional update continually trying to install

Answer 2

KB5086672 (262200.8117) is not in the provided context, but the described behavior (Start menu and taskbar not working after an update, then working again after uninstall) matches a known class of issues where apps that integrate with Microsoft Office/Outlook APIs can corrupt registry data and break shell components.

Based on the available information, the most relevant guidance is:

1. Check for apps that integrate with Office/Outlook/Calendar
   • Apps that use Microsoft Office APIs (for example, ClickShare is a documented case) can cause Start menu, Windows search, and UWP apps to stop working when registry keys or related data are damaged.
   • To mitigate this, uninstall apps that integrate with Windows, Microsoft Office, Microsoft Outlook, or Outlook Calendar, then reboot and test the system with the update installed.
2. Reinstall or update affected integration apps
   • After confirming the system works with the update and without the integration apps, install the latest versions of those apps from their vendors.
   • For ClickShare specifically, see the vendor and Microsoft guidance referenced in the KB article for similar symptoms.
3. Keep Windows updated
   • Ensure all cumulative and servicing stack updates are installed, as some builds specifically address Start menu issues.
   • For example, KB5016629 (OS Build 22000.856) explicitly addresses a known issue that could prevent opening the Start menu.
4. If the issue persists only with this specific build
   • Pausing updates, as already done, is a valid temporary mitigation.
   • Monitor subsequent cumulative updates for fixes, and install them when available.

If uninstalling or updating Office-integrated apps resolves the Start menu and taskbar failures while KB5086672 remains installed, the root cause is likely similar to the documented Office API integration issue.

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References:

• January 10, 2023—KB5022287 (OS Build 22000.1455)
• August 9, 2022—KB5016629 (OS Build 22000.856)