If you're in Windows 11 and you're having problems with an app from Microsoft Store, consider these updates and fixes.

First, sign in to your Microsoft account. Next, work through these possible solutions in the order presented. 

1. Make sure Windows is up to date.
   Select Start > Settings > Windows Update > Check for updates. If there is an available update, select Install now.

2. Make sure that your app works with Windows 11. For more info, see Your app doesn't work with Windows.

3. Update Microsoft Store.
   Select Start, then from the apps list, select Microsoft Store. In Microsoft Store, select Library > Get updates. If an update for Microsoft Store is available, it will start installing automatically.

4. Troubleshoot games.
   If you're having issues installing a game, see Troubleshoot game installations on Windows.

5. Repair or reset your apps.
   See Repair or Remove programs in Windows.

6. Reinstall your apps
   In Microsoft Store, select Library. Find the app you want to reinstall, and then select Install.