Background-info:
I\'m using Microsoft Visual Web Developer 2010 Express.
Info about my (lack of) experience: the problem occured with
If you look at the config you'll see that installing SQL Server was a red herring;
SqlServerCE is not, I'm afraid, full blown SQL Server, it's SQL Server Compact Edition. I would have thought that would have been installed with VS Express, however you can download the specific installers from here
I actually had both SQLServerCE and Express installed, but the tutorial used Compact Edition: One step within part 4 of the tutorial is to explicitly add the part you quoted to the Web.config. So this is a part of the web.config by intention.
But deleting this part from the web.config makes it possible to add the Controller in the way the tutorial described it. While this means no longer exactly following the tutorial, it's fine for me. (This results in the creation of an MvcMovie.Models.MovieDBContext database in SQL Server Express.)