title: ASP.NET can't access SQL server in VS2012
body: <p>I  had to reinstall SQL server, and now my app is not able to connect to the new (localhost) installation.  My connection string is using windows   authentication</p>
  
  <p>I'm getting an error message that the login failed for MACHINE\USERX, however that user has full permissions for the SQL Server.  I'm running Windows 10, and if I recall correctly you used to have to add ASPNETUSER, but that user does not exist, nor can I figure out how to have the IDE run as NetworkService etc.</p>
  
  <p>ETA: SQL Server 2014 Express</p>