I have restrarted the server and the services has started now.
I connected to the instance.
But when I am trying to open Properties of the instance I am getting the following error:
Failed to retrieve data for this request
Failed to connect to server
A connection was successfully established with the server,
but then an error occured during login process.
(Provider: Shared Memory Provider error: 0-No process is on the other end of the pipe)
I have confirmed that all the protocols are enabled.