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I installed Ubuntu 12.10 alongside Windows 8 after this guide. Now I can't boot Windows 8 any more. When I choose it in the GRUB screen, it shows me some kind of error, and after pressing enter it says: "A disk reading error ocurred, press ctrl+alt+del to reboot". When I reboot, it's just the same again. Ubuntu is booting normally...

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up vote 1 down vote accepted

Yeah that link was for win7 and Ubuntu 12.04. There is a problem with win8. Microsoft Windows 8 really created a mess for all Linux distributions.Your system has UEFI activated.which has to be deactivated. Follow this to install Ubuntu on a system which has win8 preinstalled. You will have to follow the steps as mentioned.You will also have to re-install Ubuntu.

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thank you very much :) –  user116828 Dec 26 '12 at 14:55
    
but windows 8 was not pre-installed on my computer, i installed it over windows 7... does that make a difference? –  user116828 Dec 26 '12 at 14:56
    
no it doesn’t make a difference. Just follow the link. :) –  Mukund Dec 26 '12 at 14:58
    
ok thank you :) –  user116828 Dec 26 '12 at 16:07
    
oh great now i tried installing windows 8 from dvd but it doesn't recognize any partitions -.- –  user116828 Dec 26 '12 at 17:10
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