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Thread: Need to revert to Windows bootloader to install Win7 SP1

  1. #1
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    Default Need to revert to Windows bootloader to install Win7 SP1

    Currently I am running a dual boot with Windows 7 and openSUSE 11.3. Windows has two partitions, one for the system partition and another for the OS. I have 3 Linux partitions (swap, root, and home). Obviously I am running GRUB to boot, but this seems to be impacting my ability to install Windows 7 SP1. I would like to revert back to the Windows boot loader, install the Service Pack, and then revert back to GRUB. How do I do this? Thanks

    If I need to supply more info let me know.

  2. #2
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    Smile Re: Need to revert to Windows bootloader to install Win7 SP1

    You need to read my article on the subject right here:

    openSUSE Dual Booting with Windows 7 AND Loading Service Pack 1 for Windows 7

    Thank You,
    My Blog: https://forums.opensuse.org/blogs/jdmcdaniel3/

    Software efficiency halves every 18 months, thus compensating for Moore's Law

    Its James again from Austin, Texas

  3. #3
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    Default Re: Need to revert to Windows bootloader to install Win7 SP1

    Thanks a million. I'll comb through this and let you know how it works out.

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    Default Re: Need to revert to Windows bootloader to install Win7 SP1

    James,

    When I ran your findgrub script this is what returned:

    Find Grub Version 2.3 - Written for openSUSE Forums


    - reading MBR on disk /dev/sda ...
    - searching partition /dev/sda1 (NTFS) ... --> Windows7/Vista Loader found in /dev/sda1

    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    You can add the following entry to /boot/grub/menu.lst :

    ###Don't change this comment - YaST2 identifier: Original name: WindowsBootLoader###
    title Windows on /dev/sda1
    rootnoverify (hd0,0)
    chainloader +1

    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

    - searching partition /dev/sda2 (NTFS) ...
    - reading bootsector /dev/sda3 (Extended) ... --> Grub found in /dev/sda3
    - skiping partition /dev/sda5 (swap)
    - reading bootsector /dev/sda6 (LINUX) ...
    - reading bootsector /dev/sda7 (LINUX) ...

  5. #5
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    Default Re: Need to revert to Windows bootloader to install Win7 SP1

    It looks like GRUB is loaded on Partition 3 and the Windows Boot loader is on Partition 1. So this first condition listed in your article applies to me? Also, could I use Partition Magic to set the active partition or should I really use the GParted?

    1. The Windows 7 Partition is not Marked Active for Booting.

    2. The Grub Boot Loader is loaded into the Master Boot Record (MBR)

    3. The Hard Drive Windows 7 is loaded on is not the selected BOOT Drive in your BIOS.

  6. #6
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    Smile Re: Need to revert to Windows bootloader to install Win7 SP1

    First off, findgrub was written by please_try_again, one our super smart users that seems to know more about disk partitions than I will ever know. You can always thank him if it helps you get the Windows 7 SP1 installed. Based on what I see from Findgrub, I would boot from the GParted CD, as recommended by caf4926 and set /dev/sda1 as Active for booting, reboot and see what happens. If openSUSE still boots up and not Windows 7, it means that the MBR is loaded with grub, but I don't see that comment on your findgrub listing. Getting rid of an MBR with grub requires more work to fix.

    Thank You,
    My Blog: https://forums.opensuse.org/blogs/jdmcdaniel3/

    Software efficiency halves every 18 months, thus compensating for Moore's Law

    Its James again from Austin, Texas

  7. #7
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    Default Re: Need to revert to Windows bootloader to install Win7 SP1

    I'm not sure if this helps but this is what I got from the fdisk. I'm going to download the Gparted and go from there. Thanks again.

    Device Boot Start End Blocks Id System
    /dev/sda1 1 13 102400 7 HPFS/NTFS
    Partition 1 does not end on cylinder boundary.
    /dev/sda2 13 10260 82302976 7 HPFS/NTFS
    /dev/sda3 * 10260 30402 161792000 f W95 Ext'd (LBA)
    /dev/sda5 10260 10522 2110464 82 Linux swap / Solaris
    /dev/sda6 10523 13133 20971520 83 Linux
    /dev/sda7 13134 18356 41945088 83 Linux

  8. #8
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    Default Re: Need to revert to Windows bootloader to install Win7 SP1

    Do you actually have a windows DVD?
    Check what I did, it worked without a hitch
    openSUSE Dual Booting with Windows 7 AND Loading Service Pack 1 for Windows 7
    Leap 15.1_KDE
    My Articles Was I any help? If yes: Click the star below

  9. #9
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    Default Re: Need to revert to Windows bootloader to install Win7 SP1

    I went into Windows 7 --> Disk Management and changed the first partition (System Reserved) as Active. Then I was able to install the SP1 without issue. Now I need to merely set partition 3 as Active again and then I'll get back to GRUB?

  10. #10
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    Default Re: Need to revert to Windows bootloader to install Win7 SP1

    Quote Originally Posted by imterpsfan2 View Post
    I went into Windows 7 --> Disk Management and changed the first partition (System Reserved) as Active. Then I was able to install the SP1 without issue. Now I need to merely set partition 3 as Active again and then I'll get back to GRUB?
    Use parted Magic to take the boot flag off the windows partition, chances are there is still a boot flag on sda3 as well, which is OK.
    If it doesn't boot after that. You will need to follow my guide to re-install grub
    Re-Install Grub Quickly with Parted Magic

    Be sure to use the Parted Magic Version from my guide
    Leap 15.1_KDE
    My Articles Was I any help? If yes: Click the star below

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