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 ...

VirtualBox is great for testing out a new operating system, but your virtual machines probably aren't that special when you first set them up. Here are a few tips for making them much easier to ...

How to install BackBox Linux distribution as a virtual machine Your email has been sent Several Linux distributions are available nowadays for security and penetration testing. BackBox Linux is one of ...

Syncing your Zune in Mac OS X, running Word in Linux, giving Linux a go within Windows 7: just a few of the things you can do with virtual machines. And setting one up isn’t just easy—it’s free. The ...