Whenever Oracle releases updates for their best and free desktop virtualization software, you must update the extension pack also. If you are a person using some of the advanced features such as USB 2.0 devices, VirtualBox RDP and PXE boot for Intel cards inside virtual machine, then you must update VirtualBox extension pack to latest version. This small guide shows how to download and install latest Oracle VM VirtualBox extension pack 4.2.4 in Windows host machine. Even though, the screen shots are taken from older VirtualBox version but this will work with latest VirtualBox 4.2.4 also.
Normally if you open a saved or new virtual machine without updating extension pack but with older version, you will be getting an error message informing about USB2.0 and extension pack and VM will not start.
Either you need to disable USB2.0 controller for particular virtual machine or install/update the latest virtualbox extension pack. It is always better to have a guest Operating System with USB 2.0 support for faster data transfer.
If you want to start the virtual machine without installing latest extension pack, you can simply disable USB2.0 support under VM settings as below.
You can Install in Two Ways.
1) You can execute the downloaded file directly from Windows explorer. It will open VirtualBox program and prompt as below.
Press Install to start the installation.
2) The other way is, go to File –> Preferences in menu bar and select Extensions option in VirtualBox console.
Press Add Extension button as shown in above screen and browse the downloaded VM VirtualBox Extension Pack. That’s it.
You can view the installed extension packages in same place.
Uninstalling an extension package can be done here by selecting the pack and click remove button as below.
This installation will fix the warning message of USB 2.0 support in Oracle VirtualBox and now you should be able to start new or saved virtual machines.
Extension pack installation is very important to run Mac OS X in VirtualBox as guest machine.