Symantec Liveupdate

I have NAV 2005 running on 2 machines, a winme notebook and a winxp desktop.

Does NAV liveupdate update the program irself when it checks and runs in order to update virus definitions, or do you actually have to go to symantecs web site and download "lusetup.exe" and run it from the desktop?

Reason I ask, my winme notebook is running ver. 3.0.0.150 and my desktop is running ver. 2.6.140.0. Also my notebook no longer has "ndetect.exe" running in task scheduler.

Thanks, Chuck