The latter (HV - same message as in post you referenced).
I found a link in that thread for another V2V version on the google drive and will try that version today. Thanks!

I'm in a pickle here and don't know what to do: Either all of my VirtualBox (Version 7.0.12 r159484 (Qt5.15.2)) machines are corrupted or something is wrong with the V2V conversion process or HyperV has an issue. This seems to only happen when doing a direct conversion: logging into VBox, choosing t...

Thank you!
I had no idea VB had a webservice, after all these years of using it.
I started it as instructed and now can log in.

Probably a dumb question, but I've tried everything I can think of with no luck. Here's the situation, I run the V2V converter program and select "VirtualBox" as the "location of the image to convert" and click "Next". On the following page it says: "Enter Oracle V...

I see these questions asked all over the internet, regarding HyperV and some other virtual systems. You convert to vhd or vhdx and try to load into HyperV and your machine won't boot into the operating system (because all these converter tools, apparently, give the Win hidden/system partition a driv...