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Thread: Can't boot into Windows 7 anymore

  1. #1
    Join Date
    Sep 2013
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    Can't boot into Windows 7 anymore

    I just installed ubuntu 12.04 yesterday alongside Windows 7. I decided to go ahead and try to install 13.04 today and loaded it up on a bootable usb. I have a 500gb hdd + 25 gb ssd so the RAID data from the intel software was preventing the installer from recognizing the partitions. I tried to boot into windows to disable acceleration from intel smart response technology (this worked when I was installing 12.04) but there was no longer a Windows 7 boot option on the GRUB menu. I ran BootRepair but it did not help. The url it gave me was paste.ubuntu.com/6076833. Thanks for the help everyone!
    Last edited by Abhishek_Kher; September 8th, 2013 at 12:20 AM.

  2. #2
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    Jun 2013
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    Re: Can't boot into Windows 7 anymore

    1. Where did you install Grub2, to your linux drive or to the Windows 7 drive?
    2. Can you still boot into your linux system to edit Grub2 config files?
    It used to drive me nuts not getting Grub to boot Windows, especially Windows 7, but now I have a pretty good handle on taming that beast, pretty easy now really. About ten minutes editing a file and running a couple of terminal commands and you will be good to go. I will check here tomorrow, bagging it for the evening here.

  3. #3
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    Sep 2013
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    Re: Can't boot into Windows 7 anymore

    Yeah I actually figured I would just purge Grub and reinstall it onto each drive using Boot Repair, but that didn't help with my problem. So now it's installed on the drive I have ubuntu on and the drive with windows 7. Boot Repair gave me the url of paste.ubuntu.com/6077202 after the reinstallation of grub2. I can boot into linux through grub and its working fine, I just can't boot into windows. Thanks again for the help

  4. #4
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    Re: Can't boot into Windows 7 anymore

    Quote Originally Posted by Abhishek_Kher View Post
    .... I can boot into linux through grub and its working fine, I just can't boot into windows. ...
    Been there many times, no more! The key is editing
    /etc/grub.d/40_custom
    and knowning what to put in the lines in that config (text) file.

    First do this of course (backup the file):
    $sudo cp /etc/grub.d/40_custom /etc/grub.d/40_custom.backup

    So here is my 40_custom file that I also commented to show how to figure out what to put in the file. You can edit your file with (use any text editor, i like gedit):
    $sudo gedit /etc/grub.d/40_custom
    and all you need to do is copy what I have below then change what I have boldfaced (hda1, and the long hex code identifier).

    As you will see in the comments of the 40_custom file, use
    $sudo blkid
    to figure out the long hex code parameter to go with --set=root The blkid command will show you the UUID (the long hex code) associated with your Windows 7 drive; you will see what I mean when you run that command. Look at my sample 40_custom file contents here below to see what I mean. Note that the hda1 and BAFE4EDCFE4E9119 are for my Windows 7 not yours. The 'sudo blkid' command will get you that long hex code to replace mine for use in your 40_custom file. As for the hda1 that is also for my system, and you can pretty much figure it out by trial and error (or probably some other more rational way) when Grub boots by just using the down arrow to highlight the Grub2 option for Windows 7 and then tapping the 'e' key to edit that Grub2 boot entry at boot, and just try hda2 or hda3 or whatever depending on how your Windows 7 disk is viewed by Grub. on my system Windows 7 is on /dev/sda1 thus the hda1

    Report back and let me know how it works. And remember, once you edit and save your /etc/grub.d/40_custom file be sure to 'sudo update-grub' before you reboot to hardware that file into the Grub menu.

    #!/bin/sh
    exec tail -n +3 $0
    # This file provides an easy way to add custom menu entries. Simply type the
    # menu entries you want to add after this comment. Be careful not to change
    # the 'exec tail' line above.
    #
    # Remember to run 'sudo update-grub' after editing this file!
    #
    # This file exists in /etc/grub.d
    #
    # Use 'sudo blkid' to get '--set=root' code for Windows 7 disc partition
    # and proper /dev/sdx device
    #
    # This info came from
    # http://askubuntu.com/questions/13527...dows-partition

    menuentry "Windows 7 (loader) (on /dev/sda1)" --class windows --class os {
    insmod part_msdos
    insmod ntfs
    insmod ntldr
    set root='(hd1,msdos1)'
    search --no-floppy --fs-uuid --set=root BAFE4EDCFE4E9119
    ntldr ($root)/bootmgr
    }



    Then:
    $sudo update-grub
    $sudo shutdown -r now

    You should see a listing in Grub when you restart so you can boot into Windows 7.
    Last edited by Coder88; September 8th, 2013 at 03:58 AM.

  5. #5
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    Re: Can't boot into Windows 7 anymore

    Once you get grub2 fixed so you can boot into Windows 7 or Ubuntu, you might want to install this grub2 configuration tool, really nice.
    http://www.ubuntugeek.com/grub-custo...-settings.html

  6. #6
    Join Date
    Jun 2009
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    SW Forida
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    Distro
    Ubuntu 16.04 Xenial Xerus

    Re: Can't boot into Windows 7 anymore

    Just to add a bit to Coder88's instructions.

    If you are using BIOS to boot from the drive shown as sda, the the drive in grub will be hd0. So use (hd0,msdos2)
    Your Windows boot partition is sda2.

    Boot-Repair shows your correct UUID for sda2 on line 141. So use this UUID
    /dev/sda2 E83AEC693AEC35EA ntfs System Reserved
    For more info on UEFI boot install & repair - Regularly Updated :
    http://ubuntuforums.org/showthread.php?t=2147295
    Please use Thread Tools above first post to change to [Solved] when/if answered completely.

  7. #7
    Join Date
    Sep 2013
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    Re: Can't boot into Windows 7 anymore

    Quote Originally Posted by Coder88 View Post

    menuentry "Windows 7 (loader) (on /dev/sda1)" --class windows --class os {
    insmod part_msdos
    insmod ntfs
    insmod ntldr
    set root='(hd1,msdos1)'
    search --no-floppy --fs-uuid --set=root BAFE4EDCFE4E9119
    ntldr ($root)/bootmgr
    }
    So my Windows 7 boot data is on /dev/sda2, so do I also need to change that in line 1 along with hd1 to hd0 and the UUID?

    EDIT
    : I decided to trust my intuition and ran your code with a few changes, along with the recommendations of oldfred. In case anyone with a similar problem sees this post, here is the code I used for my own configuration.

    menuentry "Windows 7 (loader) (on /dev/sda2)" --class windows --class os {
    insmod part_msdos
    insmod ntfs
    insmod ntldr
    set root='(hd0,msdos2)'
    search --no-floppy --fs-uuid --set=root
    E83AEC693AEC35EA
    ntldr ($root)/bootmgr
    }


    I found that my boot data was stored on sda2 through gparted.

    Thanks so much for your help coder88 and oldfred! You have helped me out a lot today
    Last edited by Abhishek_Kher; September 8th, 2013 at 07:46 AM.

  8. #8
    Join Date
    Jun 2013
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    127

    Re: Can't boot into Windows 7 anymore

    So were you able to boot into Windows 7? I got to thinking, worried you overwrote your Windows 7 MBR (master boot record, equivalent of grub) on your windows disc; if necessary you could always attempt to boot to Windows and drop into Windows' rescue mode and restore the MBR. Grub kind of depends on their being an MBR on the Windows drive, but Windows always keeps a hidden backup copy of the MBR that you can restore if needed.


    Looks like you found your long hex code to use via the blkid command. Just a matter then of being sure your Windows disc has an MBR, and figuring out that set root='(hdx,msdosy)' and figuring what the value of x and y are.

    As for line one below, you can really make that anything you want (the stuff in quotes), for example you could have:

    #menuentry "Windows 7 (loader) (on /dev/sda2)" --class windows --class os {
    menuentry "My fantastic Windows 7 system" --class windows --class os {
    insmod part_msdos
    insmod ntfs
    insmod ntldr
    set root='(hd0,msdos2)'
    search --no-floppy --fs-uuid --set=root
    E83AEC693AEC35EA
    ntldr ($root)/bootmgr
    }


    Study http://askubuntu.com/questions/13527...dows-partition

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