So I understand this, you want the physical windows OS to boot, then launch another virtual OS automatically?
*Edit, I think I see what you're trying to do. I think the answer is probably no without a second account. Since you want a "guest" to do this having your base OS auto login isn't an option. You could create (or use) the guest account on your base OS then set the VM to start automatically and auto log that in.
To add to what was said above, you could have another device running that uses RDP and just have the person remote into the virtual that's running on your base OS. Make sense?