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SpashHit
Asked: 2011-01-18 05:46:12 +0800 CST

Can I virtualize a pre-installed Windows 7?

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I am considering buying a new computer with Windows 7 (64-bit) pre-installed. Would it be possible to install Ubuntu (preferably 64-bit) dual-boot on such a machine, and then, using VirtualBox / VMWare, etc. under Ubuntu, make a virtual machine that "points to" the existing Windows 7 OS (without making a copy of it)?

Just to be clear... at the end of this process:

  • I would have a machine that dual-booted both Windows 7 (64-bit) and Ubuntu (64-bit).

  • If I choose to boot Ubuntu, I would then have the possibility of running a visualization of Windows 7 within Ubuntu.

  • There would only be 1 copy of Windows 7 on the hard disk.

virtualbox

3 Answers

  1. Best Answer

    There is a section in the VirtualBox User Manual explaining how to use a real disk or partition in a virtual machine.

    I tried once, and it works. The only problem I had was the video card driver: when switching from the real installation to the virtual one and back, I have to disable/enable the GuestAdditions video card driver, if i recall well (it was long time ago).

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  2. I have setup KVM (the default virtualization software for ubuntu) to bring up a windows partition that I can alternately dual boot into.

    Sadly, its not an awesome solution, as there are a few gotchas.

    • It wasn't trivial to setup, I had to manually modify some partition permissions and such (but there are some decent articles on this you can google for)
    • As it only works with disks and not partitions, I had to use my main disk virtually. So when it started up, I got the multi-boot GRUB menu, as if I was starting up the machine. If I were to select the same OS in the virtual instance that I was running in the physical instance, it could cause serious problems with two OSes trying to mount the same partition.
    • You need to have free space on your drive to do any of this (to even dual boot). Usually pre-installed windows instances don't leave any space for a 2nd OS, so you'd have to re-size or something just to get dual booting.

    Moral of the story: its possible, but I haven't found an easy, error free way to get it working.

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  3. I'd say no (better not very easily, following Mussnoon comments), as Virtual machines set up their own (virtualized) hardware, and your pre-installed Windows 7 will be configured to work with the real hardware. Things can get messed if you do that. Plus the activation problems mentioned in my comment, and maybe even licensing related issues.

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