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I have a pc with windows 7 and Ubuntu 12.10 dual boot. I want to remove Ubuntu 12.10 and I want to install Ubuntu 10.04LTS because my Micromax Wireless 3G modem is not supported in Ubuntu 12.10. Can you please tell me how can I do that?

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The simplest procedure would be to boot with the Live CD for 10.04LTS.

Install it on the current / partition by formatting it during installation. Select other partitions like home, swap etc. if applicable but do not format them.

When you reboot, Grub menu should indicate Ubuntu 10.04 LTS.

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but the problem is when i am doing such thing, the grub is still showing Ubuntu 12.10 startup and I am unable to boot into the machine – Kalyan Chatterjee Nov 11 '12 at 13:58
Have you formatted the / partition? That is important and required – deshmukh Nov 12 '12 at 9:46

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