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Thread: can't boot after upgrading windows

  1. #1
    Join Date
    Apr 2011
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    Exclamation can't boot after upgrading windows

    Hello,

    I had ubuntu 10.04 dual boot with win xp and I recently decided to upgrade windows to win 7. Once I did that I could no longer see the grub therefore I couldn't manage to boot into ubuntu. I don't know what to do, the installation is there because I never touched that partition.

    Any suggestions will be very appreciated.

  2. #2
    Join Date
    Jan 2007
    Location
    Kentucky, USA
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    1,684
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    Ubuntu Development Release

    Re: can't boot after upgrading windows

    Windows wiped out the grub boot loader. Look here for instructions on reinstalling grub using a live CD. http://ubuntuforums.org/showthread.php?t=1014708 Once you boot back into Ubuntu you will have to update grub to include Windows 7 by running
    Code:
    sudo update-grub
    in a terminal. It must be nice to imagine you are the only operating system in the universe.

  3. #3
    Join Date
    Apr 2011
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    16

    Re: can't boot after upgrading windows

    Thanks a lot buddy. it worked.

  4. #4
    Join Date
    Oct 2009
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    2,199
    Distro
    Ubuntu 10.10 Maverick Meerkat

    Re: can't boot after upgrading windows

    Quote Originally Posted by 67GTA View Post
    It must be nice to imagine you are the
    only operating system in the universe.
    Strictly speaking...
    It is Ubuntu that is non-compliant with the MBR-system standard. But that doesn't mean we can't hate Windows for other reasons.
    ASRock P67 Extreme6, Intel i5 2500K, 8GB RAM, nVidia 6600GT, 4x1TB RAID1+0

  5. #5
    Join Date
    Nov 2005
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    Ubuntu 12.10 Quantal Quetzal

    Re: can't boot after upgrading windows

    Quote Originally Posted by YesWeCan View Post
    Strictly speaking...
    It is Ubuntu that is non-compliant with the MBR-system standard.
    Really? Is it Ubuntu's fault that the windows installer does not look for other operating systems?

  6. #6
    Join Date
    Oct 2009
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    2,199
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    Ubuntu 10.10 Maverick Meerkat

    Re: can't boot after upgrading windows

    Yes. This topic belongs in the cafe so I'll stop here. Just to clarify that the MBR boot system and the Windows boot-loader are two different things. The MBR system will boot any compliant OS in any primary partition, including an extended partition. If Ubuntu were MBR compliant there would be no need for the constant grief of broken MBRs that we see in this forum.
    ASRock P67 Extreme6, Intel i5 2500K, 8GB RAM, nVidia 6600GT, 4x1TB RAID1+0

  7. #7
    Join Date
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    Ubuntu Development Release

    Re: can't boot after upgrading windows

    IBM created the MBR system. Windows OS does not hold the standard for the MBR. Windows actually treats the MBR as empty space and writes to it to identify disks among other things, and lets certain apps hide reactivation codes there. Linux uses the MBR for the bootloader (grub/lilo), which was the original standard.

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