Post
Topic
Board Mining (Altcoins)
Re: Windows ETH Miner all cards disabled "error 43"
by
mcturkey
on 17/05/2017, 14:00:40 UTC
Had the same issue yesterday.  The fix for it is to use DDU, reinstall the good drivers, then (and this is crucial) block any further driver updates/changes.  The easiest way to do that is via one of these options: http://www.thewindowsclub.com/stop-windows-7-from-installing-drivers-automatically  (Note:  the first option does not seem to be valid anymore with Windows 10, but the Group Policy fix worked perfectly for me)

In my case, the driver that seems to be the most consistent is 16.11.5, though I've had other rigs work just fine on different versions as well.