Hello,
Is that CMS Smc or CMC Smc Error?
Please Provide the Full Version of SEP?
Is that 11.0.5002 OR 11.0.6200 OR 11.0.6300?
Make sure you are Installing the Latest version of SEP 11.0.6300?
Please check the Following KB's:
Error "Symantec CMC Smc has encountered a problem and needs to close. We are sorry for inconvenience." after installing Symantec Endpoint Protection (SEP) Client
http://www.symantec.com/docs/TECH106103
And Make sure you disable the Windows Firewall.