...nope, my VM no longer works. I'm just getting nonsensical errors (why would IVMRSurfaceAllocatorNotify9_SetD3DDevice return E_NOINTERFACE), even from programs that worked last time I tried. I'd suspect some broken update somewhere, GPU stuff has always been finicky in VMs.
I'd be happy to fix this test if I could, but without access to a functional Windows installation, there's not much I can do :/
Though I have done some manual testing with some real-world programs, so I'm confident that it's better than the previous stub, at least.