If you are having problems running Windows 8 apps after upgrading from Windows 7 here are 3 things you can try
1. If you have a 3rd party antivirus this could be blocking them so Try uninstalling and then reinstalling the antivirus program
2. Check out the Apps troubleshooter, which can …automatically find and fix some problems with apps
3. or If one or more of your Windows 8 apps contain an "X" on the app tile on the Start screen and won’t open, try uninstalling and reinstalling one of the apps from the Windows Store.
Get more help for Apps and the Windows Store