not able to start ccsvchst.exe

Hi All,

Whenever I tried to restart the symantec services in windows server 2012 by using the command smc - stop & then smc -start, I am getting an error i.e. "Access denied". The smc - stop command is able to stop only "SmcService" but not able to stop "SepMasterService". It is showing as "Stopping" for SepMasterService continuously, but not able to stop it. When I tried to start it again, it gives an error "Access Denied". 

Tamper protection is already disabled.

Please suggest any solution, as I am seeing this problem mostly in Windows Server 2012 machines.

Thanks in advance.