MCI command handling window?

[Shepherd1000]

I've recently noted that on shutting down my computer (running Windows XP), a window pops up, indicating that it is ending a program, and there are buttons to "End Now" or "Cancel". Of course, we've all seen this happen before. What's puzzling me is that the top of the window has the words "MCI Command Handling Window" ("MCI" appears as a blue or purplish icon). I've never seen those words before. Does anyone know where this is coming from?

[kram 2.0]

Interesting...when opening up XP, go to Task Manager and if that program exists when XP is running, end task it and see how it goes.

kram

[Shepherd1000]

Nope. It's not present in either the Applications or Processes tabs of Task Manager.