Well it’s been 5 days since I upgraded to Windows 10 and I still don’t have a functioning DAW 
I’ve tried a large number of purported fixes to stop my system drive from being 100% active (while not actually performing any reads/writes according to Task Manager) which effectively hangs the PC.
I’ve created a separate thread in the hardware forum to document what I’ve done in case others encounter this problem.
Currently I’m downloading a Win10 iso image to do a clean install, sigh.