I installed Ubuntu 11.10 on a separate partition. Unfortunatelly after installation I couldn't see grub menu. Ubuntu starts automatically. Then I installed the boot-repair and repaired by this software my grub. Now I can see grub menu, but there is no windows entry. Just ubuntu.
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please run the bootinfo script and add the output to your question: http://sourceforge.net/projects/bootinfoscript/ – fossfreedom Dec 05 '11 at 21:58
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http://paste.ubuntu.com/760911/ here is info generated by boot-repair. – mario199 Dec 06 '11 at 07:08
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looks like you have overwritten the windows 7 boot loader - have a look at this forum entry fix your windows 7 boot loader (http://ubuntuforums.org/showthread.php?t=1014708). when you have done that, use this question & answer to use the windows boot loader: http://askubuntu.com/questions/62440/is-it-possible-to-boot-ubuntu-using-the-windows-bootloader/62442#62442 – fossfreedom Dec 06 '11 at 23:53
3 Answers
This has happened to me several times when setting up multi-boot systems and I have always been able to fix it by running sudo update-grub
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Fortunately, update-grub is very straightforward and it will tell you exactly what it is putting in your GRUB menu, including Windows. I have seen some CRAZY solutions to this problem proposed on the forums, I've even tried some of them (and they didn't work). You really owe it to yourself to try update-grub before anything else though.

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I have resolved a Grub menu issue (Ubuntu 11.04 + Win7) with a software Grub Customiser. Good luck.

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Hot to do that? I have installed this software. What should I do next? – mario199 Dec 06 '11 at 07:47
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IN Grub Customiser use Preferences button, than choose Advanced. From there change a default entry to number which corresponds to your Windows partition. (a numbering begins from zero (0)). – Vincenzo Dec 06 '11 at 20:00
The latest Ubuntu installation seems to do all kinds of wild things if you have multiple drives and such. Your GRUB was most likely installed on the wrong HD. I found it easiest to just partition the space myself using a GPARTED cd, and then reinstalling Ubuntu. There's an option when it asks you if you want to install it side-by-side with Windows that let's you manually select your partition and also the drive grub will be installed on.

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