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 ...

As a person who uses Linux regularly, often I am asked about my opinions about other operating systems, especially those coming from large companies located in Redmond, Washington. Here's the deal.

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 ...

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 ...

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 ...