Does SEP11 Unmanaged Have a Scan Engine

Hello

I have SEP11 Unmanaged stand-alone Windows 7 desktop.  I use the updates from http://www.symantec.com/security_response/definitions/download/detail.jsp?gid=savce

The definitions update ok, someone asked when there is not a Scan Engine with this?  I thought Scan Engines came from Server installations that push updates to clients.

Checking some of the other forums, I see a Scan Engine option

http://www.symantec.com/security_response/definitions/download/detail.jsp?gid=cs

But does the unmanaged SEP11 have a scan engine that needs updating?

Thank you