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I've been trying to solve this for a while, even had a topic here: I can't boot after Ubuntu installation

Long story short, I installed Ubuntu alongside Windows 7, replacing Windows Vista. Now, when I turn on my computer, I get to grub with two options: Ubuntu and Windows 7.

Ubuntu works well, but after I choose Windows 7, I get redirected to the Windows GRUB-like environment, where I can choose either Windows Vista or Ubuntu. Neither of them works.

Anybody knows what am I ought to do now? Maybe making the GRUB option Windows 7 turning on the Windows 7 straight away?

Thank you!

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1 Answer

Boot form your Windows 7 CD and open a terminal. (Windows cmd.exe) Now type the following command: bootrec /FixMBR. See if it worked. If not, use bootrec /FixBoot. This will overwrite GRUB! Now you can only boot Windows 7. Now boot from Live Ubuntu and follow these steps:

sudo mount /dev/sdaX /mnt    #replace X by the partition where Ubuntu is installed
sudo reboot

Now you should have a new GRUB. NOTE: If you changed the /etc/default/grub, you may have to re-edit it, I don't know whether grub-install touches that one too.

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