RTR3InitEx failed with rc=-1912 (rc=-1912)

[Bob]

On 2021-01-22 12:44, Ralf Mardorf via ubuntu-users wrote:
> I wonder, if you have two got two versions of the virtualbox kernel
> modules installed, in two different locations.

I initially installed virtualbox from the Ubuntu repositories several 
years ago.  Since then I let Ubuntu (currently 20.10) update the system 
whenever there are changes.  When this problem came up a search of the 
internet suggested to remove virtualbox and reinstall it.  I did a 
remove and install from the Ubuntu repositories.  This is what is now on 
the system.

It does not look like two versions are installed.

robert at MARS:/$ sudo find -iname v*box
./home/robert/.config/VirtualBox
find: ‘./run/user/1000/doc’: Permission denied
find: ‘./run/user/1000/gvfs’: Permission denied
./var/lib/dkms/virtualbox
./root/.config/VirtualBox
./etc/default/virtualbox
./etc/init.d/virtualbox
./usr/bin/VirtualBox
./usr/bin/virtualbox
./usr/lib/virtualbox
./usr/lib/virtualbox/VirtualBox
./usr/share/lintian/overrides/virtualbox
./usr/share/virtualbox
./usr/share/doc/virtualbox
./usr/src/virtualbox-6.1.14/include/VBox
./usr/src/virtualbox-6.1.14/VBox
./usr/src/virtualbox-6.1.14/vboxnetflt/VBox
./usr/src/virtualbox-6.1.14/vboxnetadp/VBox
./usr/src/virtualbox-6.1.14/vboxdrv/VBox
robert at MARS:/$

In /lib/modules/5.8-40-generic I tried to do the rm of vbox you had 
suggested and got the error message "rm: cannot remove 'vbox': No such 
file or directory"

I was a bit surprised that virtualbox says it is version 6.1.16 and the 
directory is 6.1.14.