Ubuntu 12.04.1 Setup doesn't detect Windows 7 partition

Posted by Dom on Ask Ubuntu See other posts from Ask Ubuntu or by Dom
Published on 2012-10-10T16:35:51Z Indexed on 2012/12/17 23:14 UTC
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I'm not really that of a linux pro, more of a noob. But i can handle console operations. Well, this is my system:

ASUS ZenBook Prime UX31A 256 GB ADATA MX11 SSD Intel Core i5-3317U (Ivy-Bridge)

I have a fresh installation of Windows 7 Ultimate (not activated) on a 90 GB NTFS Partition on my SSD, the rest is unassigned. I want to install Ubuntu 12.04.1 from an USB Stick (no CD-Drive...) created with Universal USB Installer 1.9.1.1. However I'm not givven the option 'Install alongside Windows', and when i choose 'other' it shows that 256 GB of 256 GB are unassigned (free) Memory.

os-prober gave me: /dev/sda1/:Windows 7 (loader):Windows:chain

I also tried: sudo dmraid -rE

and: sudo apt-get remove dmraid

with no success... How can I install Ubuntu alongside Windows? Thanks very much in advance!

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