Confirmed, it seems to be a Window 10 1809 issue. Builds 1803 and 1709 seem to work fine. The must have made changes to the bcrypt.dll library. I've tried using the 1803 version of the library on 1809 with no luck.
On a positive note, the Windows version appears to be pretty stable.
I have it running on 6 rigs with no issue. 6x 1080Ti rigs work at full speed.
Titan XP cards are getting 1.4 G/s with a 100 MHz core overclock.