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I had Windows 7 installed on my machine, and then late I've installed Windows 8 (dual boot), and they work fine together.

Windows 8 was normally loaded, but to load windows 7 I had to reboot the machine first from Win8 boot menu.

Now, after installing Ubuntu 12.04, I can access Windows 7 normally, but when I want to access Windows 8 I can't, system reboot and I am again on GRUB loader. What can I do to fix this?

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Please indicate your Boot-Info URL. –  LovinBuntu Sep 11 '12 at 7:56
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try to run Linux an use command sudo update-grub. And tell us if it worked. –  Misery Sep 11 '12 at 10:02

1 Answer 1

You have to repair Windows booting first.

This will write Windows MBR !

Can be done using StartUp Repair from Windows 8 DVD/USB or use "Dual-boot Repair" utility.

Then you can either triple-boot over Windows boot manager or over GRUB - it is your choice:

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