Just a quick message (I did not save error logs and deleted the Virtual Machine). When I ran an apt upgrade tonight, I was offered the new update for VirtualBox (6-1-26). It ran with all kinds of dep mods for dkms and when it installed the new update, it loaded a virtualbox dkms that seemed to replace the standard Mate offering. (Took a long time to compile, but threw no errors)
Once it was all done, VirtualBox was not loaded in the menus or the desktop. Had to go to console and remove, then went to Software Boutique and installed from there.
VirtualBox was loaded into the OS, started normally, but when the previous Virtual Machine (Win 98 SE) was added back to the VirtualBox menu, the VM drive was not recognized. And the Windows 98 SE would not load (crashed with error at the VirtualBox Console).
I was just playing with Windows 98 SE to see if it was stable in a virtual machine. It never really was..... just too old code.
Ubuntu Mate.... who could ask for anything better. Your OS runs reliably on every machine I own! Grrreatt!