Cloned/Restored disk from a Windows 2016 server snapshot will not boot.

I am following the procedure GCP defined here: https://cloud.google.com/compute/docs/instances/windows/creating-windows-persistent-disk-snapshot#read-only

THE ISSUE:

After I create a new disk from my snapshot and CLEAR its READONLY flag (per these instructions above), I am stuck with the following ERROR in the GCP SERIAL CONSOLE and the new VM refused to boot.   

It looks like the new VM "hardware" changed enough to make windows hate me.  I have selected all the identical virtual machine settings.  

Has anyone been successful at this?  

My overall intent is to provide a way to clone a production Windows Server into our test project or roll back when a patch/upgrade "boogers" up the server.