Failed to generate a user instance of SQL Server due to a failure in starting the process for the user instance. The connection will be closed

Question

I\'ve attempted to add a \"service based data base\" (.mdf) to a project in an asp .net application. From there I\'ve proceeded attempted to create an entity framework model

Answer 1

I have got the same error, it's fixed after the following change.

Deleting the folder C:\Users\User\AppData\Local\Microsoft\Microsoft SQL Server Data worked for me in Windows 7. Have to restart VS after deleting the folder.