I installed a retail version of Windows 8 Pro. I downloaded and installed Visual Studio Express 2012. I asked for and received a developers certificate. Then I tried to c
This has happened to me in the past and I have always found that deleting the build directories resolves it.
However this time this is not working for me. I have tried - Rebooting - Deleting build directories - Running Build | Clean Solution in VS - Renewing Developer Account
The only thing that will work for me is changing my Package name under the Package.appxmanifest
However I am not overly happy with this as a solution. I will keep investigating.