I have had VirtualBox on my Lenovo laptop and its predecessors for many years, and it always just works. Now that I have a new computer I decided to install it there also, and copy the VDI file for Windows 10 over there also (I have multiple licenses). In the past this always worked when I needed to make a fresh install.
Installing VirtualBox on the new computer was no problem, but when I tried to copy the VDI file the new installation it will only let me import OVF files, which are apparently an exported version of your existing VDI files. After much muttering I swiveled around to my Lenovo laptop to export the VDI file, only to discover that VirtualBox was not installed. All the VDI files are still there in ~/.Virtualbox, but the program just ain't there. I did not uninstall it. Something else uninstalled it, but what? Why? How? I opened Synaptic and installed it on the Lenovo, and when I opened VirtualBox there were all my virtual machines, including Windows 10. The reinstalled program found the machines in ~/.VirtualBox. But there is yet another problem. The version that I just installed on the Lenovo laptop will only export in OVA format, and the version on the new computer will import only OVF files. And both versions of VirtualBox control the file manager so if it wants an OVF file that's all that it allows to appear in the folder. More putzing around. :(
