If you cannot open the guest session and get a VERR_NOT_FOUND VirtualBox error, follow the tips, solutions, and workarounds mentioned below. Check if “VBoxGuestAdditions.iso”n exists Insert Guest ...

How to install VirtualBox Guest Additions on a GUI-less Ubuntu server host Your email has been sent The VirtualBox Guest Additions gives a performance boost and extra ...

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 ...

Our Parallels Desktop and VMware Fusion shootout took a deep dive into the two most successful commercial virtualization products for the Mac, but many of you had questions about VirtualBox, the free ...