Think I'm going to give up.
Was not possible to install the DEB file from virtualbox.org, first it said there was still some of the old virtualbox installed. Using the command line I could get a bit further and see errors around old python 2 dependencies which I thought were part of linux mint 20. In any case I could not work out what that issue was.
Then went and followed the directions on this site...
https://www.itzgeek.com/post/how-to-ins ... x-mint-20/
No idea if that was a mistake, but got an error about the installation when I tried to run my VM instance and ran the suggested /sbin/vboxconfig after figuring out how to get to root and setup a root password.
However I now get the following error: The virtual machine 'Windows 10' has terminated unexpectedly during startup with exit code 1 (0x1).
To be fair, windows 10 never would install on this laptop, so there may be a hardware incompatibility which cannot be virtualized away, though it works fine with USB 1.0 support.
As a last effort I tried USB 1 and 2 support and managed to re-create the configuration error suggesting /sbin/vboxconfig and to confirm this official verison installed from the site directions above does not work for me:
- TR3InitEx failed with rc=-1912 (rc=-1912)
- The VirtualBox kernel modules do not match this version of VirtualBox. The installation of VirtualBox was apparently not successful. Executing
- '/sbin/vboxconfig'
- may correct this. Make sure that you are not mixing builds of VirtualBox from different sources.
- where: supR3HardenedMainInitRuntime what: 4 VERR_VM_DRIVER_VERSION_MISMATCH (-1912) - The installed support driver doesn't match the version of the user.
Think I'll see if I can get back to the sofware manager suggested version of Virtualbox as that at least worked with USB 1 support....unless anyone has alternate suggestions.