Funny, so I've installed windows on one rig, Win 10 Pro, especialy for Claymore 8 and my 480's and like 10 years go, Win freezes completely on a random basis 
Just one of the many reasons serious miners prefer LINUX.
my windows 7 miners are very stable, i installed it in 2013 and cloned to multiple cheap 80gb sata hdd's for multiple mining rigs..still mining to this day.