Just got my 1070 today, also having the same problem, windows is all updated but it still says it's incompatible with this version. In device manager it just lists it as Video Controller (VGA Compatible), no warning triangle or anything. The installer doesn't have the hardware error, only the version of windows error.
I have tried downloading the 32 bit, and the win8/7/vista 64bit drivers and none of them work.
I've also tried using GFE, but get the same error there too.
Any ideas?
are you sure its fully updated as there was a massive update to a newer build that had to be forced on my son's laptop to update.
Type Winver in a command prompt or via run. You should be on 1511 OS Build 10586.318 at least.