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 ...

Virtual machines can seem juuuuust a bit too geeky for most otherwise computer-friendly people. That's sad, because it's an easy, free way to try another operating system, or use those one or two apps ...

If you find yourself with a mismatched VirtualBox and VirtualBox Extension Pack release, such that VirtualBox itself cannot resolve, Jack Wallen shows you how to fix this from the command line.