Point d'entrée n'a pas été trouvé exception

J'ai installé vs2012 (11.0.50727.1),

J'ai ouvert un nouveau MVC4 with .NET 4.5 solution

j'ai créer un simple HomeController et comme j'ai voulu le démarrer localement, j'ai reçu cette très étrange erreur:

Comment le résoudre? Qu'est-ce que cette erreur et pourquoi cela se produit???

Merci d'avance pour votre aide.

    Server Error in '/' Application.
Entry point was not found.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.EntryPointNotFoundException: Entry point was not found.
Source Error:
An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.
Stack Trace:
[EntryPointNotFoundException: Entry point was not found.]
System.Web.Mvc.IDependencyResolver.GetService(Type serviceType) +0
System.Web.Mvc.DependencyResolverExtensions.GetService(IDependencyResolver resolver) +56
System.Web.Mvc.SingleServiceResolver`1.GetValueFromResolver() +44
System.Lazy`1.CreateValue() +180
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() +22
System.Lazy`1.get_Value() +10749357
System.Web.Mvc.SingleServiceResolver`1.get_Current() +15
System.Web.Mvc.MvcRouteHandler.GetSessionStateBehavior(RequestContext requestContext) +121
System.Web.Mvc.MvcRouteHandler.GetHttpHandler(RequestContext requestContext) +33
System.Web.Mvc.MvcRouteHandler.System.Web.Routing.IRouteHandler.GetHttpHandler(RequestContext requestContext) +10
System.Web.Routing.UrlRoutingModule.PostResolveRequestCache(HttpContextBase context) +9709656
System.Web.Routing.UrlRoutingModule.OnApplicationPostResolveRequestCache(Object sender, EventArgs e) +82
System.Web.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +136
System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +69
Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.0.30319.17929 
InformationsquelleAutor IamStalker | 2012-10-31