1. Windows Central Question's Avatar
    The other apps are fine. My OS is Windowsphone 8.1. Lumia 525.
    01-16-2015 05:26 AM
  2. RumoredNow's Avatar
    Are you now or have you ever been on the Preview for Developers program?

    Try reading here: windows phone 8.1 - Error code 80073cf9 when installing my own app from Store - Stack Overflow
    01-16-2015 12:57 PM

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