I was indeed, as i said, referring to "Windows Messenger" (the one that comes default with XP), it's an optional component and you can choose not to install it by using an answer file "winnt.sif"...
...same thing for Automatic updates and quite a few of the other XP features/settings.
...ofcourse, it may not help the current situation, but it's worth knowing for any future XP installs.
