Start - Run

type smc -stop ( If it prompts for password; navigate to HKEY_LOCAL_MACHINE\SOFTWARE\Symantec\Symantec Endpoint Protection\SMC, delete the smcexit key and then type smc -stop)

 

Navigate to HKEY_LOCAL_MACHINE\SOFTWARE\Symantec\Symantec Endpoint Protection\SMC

look for smcinstdata key; delete it

 

go to add/remove program and uninstall Symantec Client