NOKIA may have been a better purchase, but I dont think that Finns were looking to sell in 2010.
I think they were looking to add value to the worthless Symbian and dead Maemo.
They chose Windows for two reasons: differentiate, and make MS dependent on them, so if worst came to worst, they could count on selling to MS for a good price as MS had not other significant manufacturer but NOKIA. Very clever I would say.