I am also getting this issue...
Windows 10 Pro x64, Build 1803
CPU: Intel Core i7-5820K 3.60GHZ Six Core GPU: ASUS GeForce GTX 970 STRIX 4GB RAM: 32GB DDR4-2133MHz HDD: Samsung SSD 950 PRO NVMe 512GB
WRobot for WOTLK 3.3.5
I did a fresh reinstall of the OS just yesterday.
Get warnings about DirectX stuff going wonky. Windows explorer freezes and system has to be hard-reset to get working properly again.