The data connection I have in Server Explorer in Visual Studio isn't able to connect to my SQL Server. I have since set SQL Server to use Window's authentication and created a user with admin ability. SQL Server and Visual Studio are running on the same machine. I tried uninstalling Visual Studio, but apparently the data connection data is stored somewhere. I couldn't find anything in the Registery. Does anyone know how I can get rid of the current data connection and start over (short of formatting my drive!)? Thanks.