The will of whom? Microsoft fans in the US?
I'm all for having more democratic decision making in the EU, but if you polled the EU public right now on whether or not MS should be fined what do you honestly think would be the result?
Anyway, this is a matter of law, not public opinion.
Considering the outcry on America's corporation ( Amazon, Starbuck, Google ) that avoid taxes or manipulating legal ruses that slash their tax liability, I would take the bet that any hint of grievance will be weighted heavily against Microsoft.