Hello,

The problem has re-occurred. I've uninstalled AntiVirus program, and disabled Windows Firewall, restarted SSMS but getting error:

A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server) (Microsoft SQL Server, Error: 2)

Using: Windows Authentication.  I've also re-enabled the stopped services in SSCM, i.e. SQL Server, but when I then attempt to re-start SSMS the SQL Server goes back to Stopped from Running.

Any ideas to fix?