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I have a laptop with UEFI (secure boot disabled) with Windows 8.

I am trying to install Ubuntu 12.10 or 12.04 along side Windows 8 on my primary hard drive, which uses GPT. I am only presented with the option to erase the disk and install so the install alongside windows option does not appear.

How can I install Ubuntu without erase my Windows system?

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I presume that you are booting from the Ubuntu LiveCD trying to install Ubuntu. From what site do you downloaded the ISO? Are you trying with a single CD or did you tried burning more CDs? – Lucio Jan 13 at 23:26
I am booting from a USB drive. I downloaded the ISO images from Ubuntu.com. I have tried multiple USB drives, and several different ISO images. – NGWMark Jan 14 at 0:42
Please boot the Ubuntu disc into its "live CD" mode and then run the Boot Info Script (sourceforge.net/projects/bootinfoscript). This will produce a file called RESULTS.txt. Post a link to it. This will give us a better idea of what sort of partitions and other relevant configuration your system has. – Rod Smith Jan 15 at 17:08

2 Answers

For me that doesn't work. Something else presented me with a blank 500GB hard drive (instead of showing me the 3 partitions I made (win8, ntfs for data, unpartitioned space where i wanted to put ubuntu)

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In your case, the only way to avoid erasing Windows is to choose Something Else at the Installation type step of the Ubuntu install.

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