I don't recommend keeping 16.6, as I know, it has a fan controller bug, which either stops the fans or spins them at 100% randomly (the first one is worse).
I stopped worrying about drivers versions some time ago. My 6x480 rigs run Win 10 x64 with the 16.6 driver provided by the Microsoft drivers update routine.
It works flawlessly, with Claymore, sg-miner, gateless gate... no fan bug whatsoever.