First of all, please provide the model of your unit to better assist you with. As for the app store, you are not able to get access or not loading? If not able to get access, did you log in using a Microsoft account? If not, then please switch to Microsoft account and try again. The other is are you able to get online with IE or Chrome or Firefox? Were you able to get access before? If so, try windows syste restore to restore back to a date that it was working.