When I try to build my first Windows 8 Metro application, it throws the following error and stop deploying my project.

developer license Issue

Solution:

When we try to run our first Metro application, Visual studio try to connect with Windows Store to acquire a developer license. In my case, I am using a proxy for internet connection, which required authentication. Open the IE and when it prompted, specify the authentication and mark remember my credential option. Now try to run the Metro application.