VirtualBox Extension Pack were introduced in Virtualbox 4 as a new way to extend the functionality of the VirtualBox base package. Using the extension pack doesn't require a separate installation. The packs have a "vbox-extpack" file extenstion that's automatically handled by VirtualBox. To install it just close down any running VirtualBox instances and double-clikc on extension pack file and VirtualBox will launch and install it for you, upgrading any earlier version of extension pack you might have.The current extension pack includes a USB 2.0 (EHCI) controller that allows you to get a better performance from your USB 2.0 devices. To use it you'll have to enable the controller by hand and add filters for USB devices that you want to use t... Read More »

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