Selected wrong OS from bootloader settings and now can't do anything

Posted by Eric on Super User See other posts from Super User or by Eric
Published on 2012-10-08T14:38:28Z Indexed on 2012/10/08 15:42 UTC
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Filed under:

windows-7

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startup

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bootloader

I'm trying to help a friend out with an urgent issue he is having.

He has two Windows 7 installations when he was starting up his computer so the bootloader menu was making him select an OS every time he restarted. One installation is functional and the other is not. He wanted to make it so that he did not have to select the correct OS every time he booted up.
He chose the wrong (non-functional) operating system in the windows settings and set the time to select an operating system int he bootloader menu to 0 seconds.
Now, his computer attempts to boot into a non-working operating system and he has no way of selecting the correct operating system so that he can fix his mistake.

What can he do to get into the functional OS so that he can fix his mistake?

Thanks so much.

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