VirtualBox makes virtual installations of Windows and other operating systems easier than you'd think in Linux (as mentioned in our second look at Ubuntu 8.04, "Hardy Heron"), but the key missing ...

How to install VirtualBox 7.0 on Ubuntu-based Linux distributions Your email has been sent VirtualBox 7.0 has finally been released, and this latest iteration brings plenty of new features to the ...

It is the first thing you need to fix the issue as stated above. For that, you need to run the virtual machine showing the error and go to the Devices > Install Guest ...