A bit later I noticed that adobe_updater.exe had been hijacked and was connected to a different IP on the AAPT domain.
Guess what, a port scan (or very similar) was in progress. Literally thousands of connections had been set up between my firewall and PC.
I can see where that was heading but how don't understand how adobe_updater.exe got hijacked.
Edited by trampas, 20 April 2012 - 10:54 PM.