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I installed Ubuntu 13.04 alongside the existing Windows 7 OS. The Ubuntu installation completed successfully, and it asked me to restart my computer. When I restarted, it was just Windows 7 that loaded as usual, but Ubuntu wasn't there. Can anyone tell me what's wrong?

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marked as duplicate by Eliah Kagan, Warren Hill, stephenmyall, Robie Basak, Kevin Bowen Jul 13 '13 at 22:22

This question was marked as an exact duplicate of an existing question.

@Aditya Agreed. That question should answer this even though in this case the problem was not triggered by a recent Windows installation. Sometimes when Ubuntu is installed, the GRUB2 boot loader is not successfully installed to the Master Boot Record; repairing GRUB as detailed there fixes that. – Eliah Kagan Jul 13 '13 at 8:37

Try boot-repair. It's the only solution that looks feasible.

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Welcome to Ask Ubuntu! Whilst this may theoretically answer the question, it would be preferable to include the essential parts of the answer here, and provide the link for reference. – Eliah Kagan Jul 13 '13 at 8:38

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