I had an MVC project on 2012 (Windows Security) which I can run up and see the User.Identity.Name for OK, which is my PC and user name, fine so far.
Take that project and run it up on 2013 and I get an error message No Access. If I goto the configuration for it on IISExpress, I have to set anonymous to False then I get a password prompt, I have to sign in again before I am allowed to use the site.
Any ideas why this is happening as it was all working on VS2012