Installation constantly rebooting

[newbyr]

I installed OVOS on a Microsoft System 3 (!) which already had a Linux Mint install successfully running. All went well on the install and it worked fine.
Now, after restarting the system, it is in a constant rebooting loop. The linux Mint is up and fine, but it loads OVOS, which opens the screen with logo OVOS and the blue spinning loader symbol, but the spinner does 4 loops and then it crashes and restarts OVOS.
I can't even get to the Mint as the reboot keeps interrupting any action ! It's difficult even to just turn the Surface off !

Help please, to either fix, or kill OVOS booting long enough just to either test it or remove it.
Thank
Very boring and short video is here https://www.jottacloud.com/s/385da6fec5920584cd7bd86d8b56fd9dd45