You will then loose more.
Microsoft is not needed, nor wanted in the mobile world. It can try to keep its monopoly, closed source and backdoors in the PC world, but in the mobile world it will fail. There won't be any 3rd ecosystem with Microsoft, no matter how much money MS will throw in.

15 years of failing:
http://en.wikipedia.org/wiki/Windows_CE
Stupid Nokia wanted to be a slave and 100% dependent on this company.