Hi, Jcloud. Thanks for the response.
I messed with it for a while and eventually started over. I'm wary since this is the third time I've started over without knowing what really happened. I tried to do a system restore, but it didn't even see the ? drive where windows was installed. It just got stuck in a boot loop where it kept coming up with a "Critical Service Failed" message.
What I found was that the driver for the VirtIO disk wasn't loaded. From the "advanced options" command prompt, I went to the setup CD and ran setup. I went to the point where it asks you to install on a disk, and I loaded the driver from there. Then, when the disk showed up, I just closed the install tool and went back to the command prompt.
From that point, I had access to the ? drive. I googled around and found that a lot of times, it is the driver signing feature that needs to be turned off. I couldn't use bcdedit since it couldn't load the boot store for some reason. That's the point where I just started over.
I'm trying to get a Windows 10 VM running with passed through Nvidia 750Ti and a USB mouse/keyboard. I am using a vdisk, not an HD.