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Possible Duplicate:
How do I reinstall grub2?
How can I repair grub? (How to get Ubuntu back after installing Windows?)

I know that this issue may have been happened to many people and answered many times. For some reason, I had to install Windows XP beside Ubuntu 12.04 LTS. Once I did that, I'm no longer able to log on to my Ubuntu. The booting list screen doesn't show up.

I tried some ways to fix that, one was to try Boot Repair (of course after opening Ubuntu live from a USB), however, the program didn't open after the installation had finished !!

So how can I fix that? I hope you guys stick a little with my problem until it is solved

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marked as duplicate by con-f-use, RobotHumans, Tom Brossman, Eliah Kagan, Jorge Castro Sep 4 '12 at 0:47

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

You have to reinstall grub2 boot manager. See: How do I reinstall grub2? – con-f-use Sep 3 '12 at 21:21
up vote 1 down vote accepted

That's because Windows uses NTFS hard disk format, but Ubuntu doesn't. Try backing up your neccesary hard disk files, and then get GParted and burn it onto your CD or USB, and format your Hard Disk to NTFS. Then install Windows XP, and get the Windows Ubuntu Installer and install Ubuntu. Hope this helps!

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