Null is not available error

Bob Smith 0 Reputation points
2026-09-09T11:15:16.7666667+00:00

I am getting null is not available errors when trying to open apps on my windows 11 home laptop

Windows for home | Windows 11 | Windows update
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  1. AI answer

    2026-09-09T11:15:31.94+00:00

    If Windows apps fail to open with a "null is not available"-type error on Windows 11 Home, use these fixes in order:

    1. Restart the PC
      Go to Start > Power > Restart.
    2. Try opening the app again
      For some Windows apps, the first launch can fail temporarily and the app may open on the next attempt.
    3. Check Windows Update
      Go to Start > Settings > Windows Update > Check for updates.
      Install any available updates, then restart and test the app again.
    4. Repair or reset the affected app
      Go to Start > Settings > Apps > Installed apps.
      Select the app > Advanced options > Repair.
      If that does not help, select Reset.
      Note: not all apps have these options.
    5. If the app came from Microsoft Store, update or reinstall it
      • Open Microsoft Store
      • Select Library > Get updates
      • If needed, find the app in Library and select Install to reinstall it
    6. If this started after System Restore
      Windows apps that use the MSIX app package format can temporarily fail after System Restore. In that case, Microsoft recommends:
      • starting the app again
      • reinstalling the app from Microsoft Store
      • reinstalling the app from its original source
      • running Windows Update
    7. If the problem is with Microsoft 365 apps such as Word or Excel
      Repair Office:
      • Go to Start > Settings > Apps > Apps & features
      • Select the Office app
      • Open Advanced options and select Repair
      • If needed, use Control Panel > Programs > Programs and Features, right-click Microsoft Office, then select Repair or Change

    If the issue affects many apps, not just one, and the steps above do not help, a Windows repair installation can be the next step.

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  2. Ivan B 122.3K Reputation points Independent Advisor
    2026-09-09T11:57:15.34+00:00

    Hi,

    Is this happening with any application, or only with Microsoft Store apps (APPX)?

    If possible, could you take a screenshot of the error when trying to open the app?

    Did this happen after installing a specific application or an update?

    Thanks.

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