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Thread: Windows "missing operating system" after Ubuntu 12.10 instal?

  1. #21
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    Dec 2012
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    Re: Windows "missing operating system" after Ubuntu 12.10 instal?

    I tried with both rEFIt and rEFInd, and I cannot access the grub loader menu. It says something about it being missing?

  2. #22
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    Jan 2008
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    Ubuntu Development Release

    Arrow Re: Windows "missing operating system" after Ubuntu 12.10 instal?

    ok.
    Please run Boot-Repair --> Advanced options --> "GRUB location" tab --> select "Place GRUB into: sda" --> Apply.
    Tell me the new URL that will appear.
    Then reboot and tell what you observe.

  3. #23
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    Dec 2012
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    Re: Windows "missing operating system" after Ubuntu 12.10 instal?

    I tried that an I got the message:

    "GPT detected. Please create a BIOS-boot partition (>1mb unformatted filesystem, bios_grub flag). This can be performed via tools such as Gparted."

  4. #24
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    Re: Windows "missing operating system" after Ubuntu 12.10 instal?

    via Gparted, reduce your sda4 partition in order to make 1MB free space between sda3 and sda4.
    Then in this space, create a 1MB unformatted partition with bios_grub flag.
    Then run Boot-Repair --> Place GRUB into sda.

  5. #25
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    Dec 2012
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    Re: Windows "missing operating system" after Ubuntu 12.10 instal?

    Actually, I tried booting into Ubuntu via rEFInd and could find the GRUB menu, I just couldn't boot into my mac osx partition or windows partition from that menu...

  6. #26
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    Ubuntu Development Release

    Question Re: Windows "missing operating system" after Ubuntu 12.10 instal?

    Can you boot MacOS and WIndows from Refind?

  7. #27
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    Dec 2012
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    Re: Windows "missing operating system" after Ubuntu 12.10 instal?

    Mac os yes, windows no. I can't boot into windows from any bootloader, they all say its missing the os.

  8. #28
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    Jan 2008
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    Ubuntu Development Release

    Re: Windows "missing operating system" after Ubuntu 12.10 instal?

    Where you able to boot Windows before installing Ubuntu? if yes, how?

  9. #29
    Join Date
    Dec 2012
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    23

    Re: Windows "missing operating system" after Ubuntu 12.10 instal?

    I did by holding down option, using the bootcamp bootloader, and choosing windows.

  10. #30
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    Ubuntu Development Release

    Re: Windows "missing operating system" after Ubuntu 12.10 instal?

    Then you should reinstall Bootcamp and check if you can still access WIndows from it.

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