Ubuntu stuck asking to remove installation medium on Hyper V install

I'm trying to install 16.04 on a virtual machine on my Windows 10 laptop. Everything goes fine with the install with the only variance from defaults is the usage of third party video drivers. I click ok to reboot and it then tells me to remove the installation medium and press enter. It's a virtual machine install, how do I do that without removing my keyboard?

Taken from https://www.eightforums.com/tutorials/5078-hyper-v-create-linux-virtual-machine-windows-8-a.html:

When Ubuntu reboots and stops telling Please remove installation media, click Stop to stop and close vm. This ejects the installation media

and now Restart vm, and you will be able to log in

After installing GnomeUbuntu 16.04 iso on Hyper-v went to the Hyper-v/ Configuration Settings/Bios and moved IDE to 1st boot position. It worked for me.