I have created a new project in ASP.NET MVC 4. Normally you just hit F5 and it runs as a semi empty project. Instead I'm getting:
Parser Error Message: Could not load file or assembly 'MySql.Web,
Version=126.96.36.199, Culture=neutral, PublicKeyToken=c5687fc88969c44d' or
one of its dependencies. The system cannot find the file specified.
I guess your machine.config file has been changed, I suggest take a look at that in either of these locations:
as suggested by Petoj in this post