This is basically the same thing the EU did to another Seattle company, Boeing.
Back then, Airbus was in the formative stages, and Boeing was in the process of purchasing McDonnell Douglas, shutting down the DC-8/DC-9/MD-80/MD-90 lines, and signing airlines to Boeing-only fleets.
What did the EU do? Step in, and argue that iBoeing's actions were somehow uncompetitive.
This, from the same governments that had all their 'aerospace' companies sucking at their respective national teets while nurturing Airbus Industrie (now Airbus SAS)!
Boeing folded like a limp noodle, Airbus grew stronger, and the rest is history.
I'm glad Microsoft IS fighting this. I know the Eurograts would definitely like to replace Microsoft with a 'local hero', but Linux ain't him.