Not a request for help or a tutorial, just a short guide to avoid any pitfalls, but some others might find it useful.
I now have my old tomtom go updating and working through boxes.
1- Downloaded a microsoft win 10 ISO
2- I installed an older version of boxes through the software centre, as I do not want flatpaks or snaps, I've disabled snap from ever being able to install (even accidentally). the version I installed was 3.36.5- stable.
3- installed win 10 ISO on boxes (i used express install as i had an activation key)
4- from within the win 10 box, i downloaded and installed tomtom my drive connect.
5- I couldn't get the tomtom device to show on the USB so I closed win 10, closed boxes and rebooted Zorin with the tomtom plugged in and powered up. (rebooting zorin was probably unnecessary, might have just needed to reopen boxes/ win 10)
6- opened boxes / win10, and made win 10 box full screen within boxes window.
7- 3 vertical dots menu (right hand side side of title bar) select properties, then devices and shares, where I could now enable the USB port the tomtom was plugged into.
8- Open tomtom connect and the tomtom was connected.
downloaded map update and installed correctly on the tomtom.
9- the end
Note boxes is very easy to use and set up, not like virtual box or vm manager. I think if I wish to check out other linux distro's I'll be creating them in boxes.
If I can I will also close this topic as it is fully working,
EDIT
I just noticed that I can't mark this a solution as well. Hopefully someone will reply and I can close this with their reply as a solution!