I don't know if it is specific to me, but I also have issues installing drivers in win10 for vega. I get one driver installation, after that something always goes wrong and I have to reinstall windows.
Awesome it's not just me. I have the same issue's that I get 1 installed fine anything after that it's a 50/50 chance that the driver installs correctly for the other 9 Vega gpu's. I haven't tried another driver yet besides the Aug23 blockchain driver. Have you? Trying to compare notes to see what else to test to try and get them hashing. I've spent WAY to much time on get more that 1 Vega GPU working...
I'm running 2x Vega FE. The public drivers I've run are Vega FE release drivers, Vega FE beta(public) and the aug. 23 block chain drivers.
I got both cards up to 42.4Mh/s last night. Windows updated and restarted the computer and I can't get them past 36mh/s now. Very frustrating.
Windows update usually installs newest GPU drivers. So just uninstall your drivers with DDU in safe mode, reinstall proper drivers, and disable windows update.