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while installing Ubuntu 10.04 over windows 7 I'm getting "no root directory found" when I'm installing through the image.

While installing through CD the system is not detecting the installed operating system and my whole HDD (500gb) is shown as a single one. No partition is shown.

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there can be several reason, first of all your disk can be off type dynamic not basic. In this case it is impossible to install ubuntu & probably this is the cause your hard disk is shown as one disk. Check the disktype from windows console. Secondly, how your disk is formatted. If it is GPT formatted then probably 10.04 can't read that (I am not sure though). Please try to use latest version of ubuntu either 12.10 64bit or 12.04.2 – Web-E Mar 21 '13 at 4:32
Currently the latest version is 14.04 LTS – Elder Geek Jun 27 '14 at 0:09

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