updated post with pic.
its a complete farce really. LOL
you can see is 2 rollbacks as I tried it twice.
That error code I think but is only a think from some googling seems to be bootloader related, very bizarre given I have already managed to get windows 10 installed.
My working theory is at the moment, I have confused the installer/upgrader by adding some more hdd's.
As since installation I added 3 hdd's ro access data on them and also test some FreeBSD stuff on two of the hdd's which have zfs on them, but the ssd with win10 on has not been modified at all by FreeBSD.
If I have to disconnect these hdd's (not trivial in this case, and even moving the case out of its tight area isnt trivial either),everytime to do a build update its a joke.
Aardvark the snooping on my test rig wont yield much
just me googling how to fix their problems.