Unknown Program Starting

Archived from groups: microsoft.public.windowsxp.help_and_support (More info?)

I am running Windows MCE, with all the latest updates. Adaware, Spybot S&D,
and AVG Anti-Virus all report there are no problems with my system.

My problem is, a program keeps starting up, roughly every 20 minutes or so,
running for a split second or so, and then closing itself. It doesn't have a
window, it just appears in the taskbar and steals focus from whatever
application I'm running (including full screen programs, taking me back to
the desktop which is very annoying). There is no name in the taskbar, and it
has a non-distinctive icon. I can't identify the program in the task manager,
because it disappears too quickly. Can anyone tell me how I can identify
whatever this is so I can remove it?