OK Noel,  I've spent a fair bit of time tracking this down and I can tell you that it is indeed the Realtek ASIO driver.  I can use the WDM drivers fine, but once I switch to ASIO with the Realtek drivers installed, it's crash city.  My Motherboard is the Asus Prime x370 Pro which uses the Realtek® ALC S1220A audio chipset.  The Realtek audio driver can be downloaded from here:
http://dlcdnet.asus.com/p....1402573813.1488596512
 
I'm not sure if this will work with other Realtek chips, but if there is anything you need me to do in testing, I'm happy to help.  The crash is 100% repeatable.
 
Cheers,
Bill.