They can deactivate cloud services likely on a press of a button, for all EU IP addresses.
If there’s a killswitch in Windows, yes. Otherwise they can still selectively put out an update that would lock up your PC and disable it from functioning, possibly even wiping any and all drives in the PC completely clean.
The likelihood of this scenario is small outside of either the USA invading Europe, or Trump giving the EU to Russia or other powers, while Trump promising MS no taxes and regulations for a given period.
The likelihood of this scenario is small outside of either the USA invading Europe, or Trump giving the EU to Russia or other powers, while Trump promising MS no taxes and regulations for a given period.