Windows 7 64 Bit Clients
Windows XP 32 Bit Clients
I've done it before with SEPPrep:
Similar thread here:
https://www-secure.symantec.com/connect/forums/uninstall-sep-client-remotely
Hmmmm, "Unsupported" discourages me greatly.
There is no "official" way to do it. This works but if something breaks, it's on you to fix.