Why is Virtualbox slow when my processor isn't used at 50% ? [Netbook]

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https://bbs.archlinux.org – Hello everyone,I have installed virtualbox on my Arch Linux machine, an Asus 1215N with Atom D525 Dual Core (no virtualization support), with 2GB of ram and an Nvidia Optimus (I thinks this will talk to all...), and for my school works (that require working with Ubuntu just to show that we know, and Windows for XNA and Visual Studio).I know my pc is not a war machine, and virtualization isn't a good idea at all... but I excepted Virtualbox at least to try to use all my Hardware so I can emulate something like Ubuntu or Windows 7/XP smoothely enough to not hit my head into a wall...But the (HowTos)