If you're still experiencing problems with an app store, you can try running the Apps troubleshooter. This tool can automatically identify and fix some problems with apps.
Use this link to download and run Apps troubleshooter.
http://go.microsoft.com/fwlink/p/?LinkId=268423
Use this link to download and run Apps troubleshooter.
http://go.microsoft.com/fwlink/p/?LinkId=268423