provider: Named pipes provider, error: 40 - Could not open a connection to SQL Server (Microsoft SQL Server, Error: 2)

provider: Named pipes provider, error: 40 - Could not open a connection to
SQL Server (Microsoft SQL Server, Error: 2)

![sql login error][1]
provider: Named pipes provider, error: 40 - Could not open a connection to
SQL Server (Microsoft SQL Server, Error: 2)
My sql server enterprise free edition 2008 was expired later I updated
using sql key and updated successfully but when I tried to open sql got
above error while logging.
Before updating I tried to check by making system date previous still got
same error
I checked sql server configuration services and got message The Remote
procedure call failed
Please help me... thanks.