Microsoft SQL Server 2012 Standard Error 233 and 18456

SQL Server 2012 Standard on Windows Server 2012, all updates installed.

When using Visual Studio SQL Server Management Studio and using the Connect button in an attempt to connect to the database engine or other services, I get error 18456. When trying to connect via the Connect Object Explorer button I receive error 233.

I tried disabling Windows Firewall.

I opened Ports 1433 & 1434

I enabled inbound dynamic connection to application sqlserver.exe.

I am trying to log on as the administrator with the correct administrator password.

I am using Windows Authentication. (SQL Authentication generates Error 18456, Status 1, in all cases)

Object Explorer will connect to the default SQL instance Integration services, but generates the same errors for all other connections.

Any suggestions?