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Installed Windows 7 on a newly assembled PC (yesterday). Runs fine. trying to install Ubuntu 12.10 64bit from DVD but installer does not give me an option to install "alongside" Windows 7. I only get the wipe everything or go fiddle with the partition options. "no operating system found"

Intel mobo DH77DF with an mSATA SSD of 256GB, primary partition with windows 7 is some 60GB, with the rest unallocated.

Installer running off a USB DVD drive.

Looking at the drive from the installer's partition mapper the Windows partitions can be seen, but no operating system is found.

How do I get around this?

I've installed various linux distros over the years and never seen this before.

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