I've built my app for Windows Store, run it successfully from within the Visual Studio package created by Unity, associated my app with the Store, but every time I try to create the app package via STORE->Create App Packages, I get the following 2 errors in Visual Studio: 1) Cannot import the key file 'MetroTestCertificate.pfx'. The key file may be password protected. To correct this, try to import the certificate manually into the current user’s personal certificate store. 2) The certificate specified is not valid for signing. For more information about valid certificates, see http://go.microsoft.com/fwlink/?LinkID=241478. I've been banging my head against this for days, I've read everything I can find online (which isn't much,) and I've followed every step-by-step list I can find for submitting an app to the Windows Store. Has anyone else run into this, or has anyone successfully packaged an app for the Windows store?