I do not need a solution (just sharing information)
I created a task to 'Run LiveUpdate' on a PC using an Altiris task. Could not find one.
Checks for 32 or 64-bit.
Checks for SEP11 or SEP12 and runs the appropriate live update.
I've attached the Run LiveUpdate.XML
If you have any suggestions, I'd appreciate them.
I run this in a two step job (LiveUpdate-SEP)
1st task is 'Run LiveUpdate'
2nd task is 'Antivirus inventory'.