I think that in the EU Microsoft is on very thin ice considering how we've reacted to their misuse of monopoly in the past. This time however they're trying to hide behind that minor detail that Microsoft is "only" a board member of UEFI forum. I'd say they're shooting themselves in the leg with these kind of stunts. They're certainly not looking at the big picture. Instead of forcing others they should be doing something others really want to adopt (and not sue them over adopting it either).

You can't expect to be running a successful company if you're this fearful of competitors.