Tom,
I installed W11 to check and the fiirst thing that I notice is that VMs take waaaay longer to boot than under W10.
If you get the watchdog message, go to settings and uncheck the
Connected box under
Device Status for each network adapter. You may have a loop.
I personally use VirtualBox both under Windows and under OS X. I find it much more responsive and easier to configure. But, hey, that's just me...