Prob with installing

[AjAy PS]

I was not able to install app in 520 after updating to 8.1

 

[ven07]

Just one app?

 

[RumoredNow]

Check and make sure your Microsoft Account can sync.

Settings > email + accounts > hold down on Microsoft Account name > after the popup, tap sync

​If it fails, make sure the date and time are correct... Turn Data Sense off and try again. You may need a reboot.