Even last night Windows (or MultiMiner) "forgot" 2 asicminers. I woke up to find that 2 of them had the dreaded solid green light, turned on my monitor and sure enough, 2 of them stopped working for no apparent reason. I unplugged them and they are now running on my Bitminter / Mac just fine so it is not the devices themselves.

Thank you I will try updating the drivers.