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As noted by many people, Windows 8's UEFI requirements might will won't get in the way of installing Linux (or whatever), as the replacement bootloader will also need to be signed somehow. Some systems All systems will let you disable the signature requirement, but the feature might be hidden to disable or you might not be willing to give up on the benefits of a secure bootloader.

Is it necessary to replace the bootloader in the first place? To keep ourselves to software that's gone golden, how can I install Ubuntu 11.04 using Windows 7's own bootloader?

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Wubi does this - they add the Ubuntu option to the Windows Bootloader –  Marco Ceppi Sep 21 '11 at 19:28
    
EasyBCD shows a method to do this - I'm not sure though that that is what you wanted to do - can you clarify? neosmart.net/wiki/display/EBCD/Ubuntu –  fossfreedom Sep 21 '11 at 20:45
    
@fossfreedom Yes, that's what I wanted to achieve. –  badp Sep 21 '11 at 21:22
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Don't panic just yet. Dual booting might become impossible on some corporate managed work desktops while it remains available for the rest of the world. Grub2 still rules! –  aquaherd Sep 21 '11 at 21:50
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Assuming that Windows is already installed, install Ubuntu on another partition. Make sure that you install Grub2 on the Ubuntu partition - don't install it on the MBR since this will overwrite the Windows boot-loader.

Boot into Windows and install EasyBCD

Add Entry and choose Grub2 i.e.

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Then write back the modified Windows Boot-loader i.e.

enter image description here

Reboot - you will now have two options:

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Boot into Ubuntu and change the Grub Timeout value i.e.

gksudo gedit /etc/default/grub

change "GRUB_TIMEOUT=10" to "GRUB_TIMEOUT=0" and save.

Finally:

sudo update-grub

source

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