Grub uninstall by Windows 7 on dual OS

Tom H tomh0665 at
Fri May 21 17:08:19 UTC 2010

On Fri, May 21, 2010 at 10:40 AM, Tom H <tomh0665 at> wrote:
> On Fri, May 21, 2010 at 9:01 AM, Karl Larsen <klarsen1 at> wrote:
>> The link to SuperGrub  gives this:
>> Grub default installation consist on installing what we call stage1 in the
>> MBR. After that after the MBR and before the first partition beginning the
>> stage1_5 is written. This stage1_5 conflicts with some Windows policies that
>> want in this space their own data. You can however bypass this problem by
>> linking stage1 to stage2, which it is not located in this problematic area.
>> This sounds like a Grub2 problem which will one hopes be fixed in the
>> future. It appears that stage1_5 is written into the first partition after
>> the MBR which is always the win7 partition. I hope they fix it soon.
> The stages 1, 1.5, and 2 files are grub1's; grub2 doesn't have them.
> It has boot.img and core.img and core.img is installed in the same
> disk area as stage 1.5.
> The Ubuntu Forums link points to a Debian bug report where the
> suggested solution is:
> aptitude install mbr (it may already be installed on Lucid)
> install-mbr /dev/sda
> grub-install --force /dev/sda1

Just remembered one more step:
The Windows partition must not be marked as bootable. It is the
partition with the kernel that must be marked bootable; so either / or
/boot if it is mounted separately.

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