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Can you dual boot Windows if Ubuntu is already installed? All of the sites I have found only work starting with Windows installed.

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migrated from Apr 21 '12 at 13:00

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1 Answer 1

The reason most tutorials start with Windows and then install Ubuntu is that Windows installs its own bootloader that does not recognize Ubuntu as a valid OS. Fortunately, it is fairly easy to restore Ubuntu's bootloader, which does recognize Windows.

How I would do this:

  1. (before installing Windows) repartition the disk in Ubuntu (Windows needs at least 20 GB)
  2. install Windows
  3. boot into the Ubuntu LiveCD
  4. install and run Boot-Repair

See this Ubuntu Documentation article for more information.

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