If VirtualBox is unable to install the extension as it already exists, we recommend you delete the folder where these extensions are installed and then retry.

Fix VERR_SUP_VP_THREAD_NOT_ALONE, VirtualBox Error in supR3HardenedWinReSpawn, by following the solutions mentioned in this article.

Do you want Oracle VirtualBox 4.1? Do you have five minutes? If you said, 'Yes' to both questions, then this tutorial is for you.

Jack Wallen shows you how to install the latest major release of the VirtualBox virtual machine manager.

How to Install Windows 8 on VirtualBox Note: This guide is written for Windows 8 Developer Preview and installed on a Dell Studio 1555 Laptop running Windows 7 64-bit version using VirtualBox 4.1. ...

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.

VirtualBox is not only easy to install on Ubuntu, or other platforms, but is also easy to use.

VirtualBox is a full virtualizer available on macOS, Windows, and Linux. When you install an operating system in VirtualBox, you're not dual-booting the new OS alongside the original one.