title: How to deploy app for Windows Phone 8.1 from PC
body: <p>I download an app (xap/appx) from Windows Phone Store (ex: clock-tile-diy.appx). I use Windows Phone Application Deployment (8.1) to deploy the app on my phone from pc. But it have error: A packaging error prevented this application from installing. Why do it have errors and How do I fix it?
  Please help me.
  Thanks for your help.</p>