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after installing Ubuntu 12.04.3 LTS i was unable to boot Windows 7 nor its Recovery partition They both appear in the boot menu but they dont manage to work.

I've tried using boot-repair without success. here is the output of it -

http://paste.ubuntu.com/6470381/

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This is a very common problem, so don't worry. You are not alone, in fact, I was once in the same boat. There is also a very simple fix to your problem. Here's what you can do:

  1. Boot into Ubuntu.
  2. Press Ctrl+Alt+T in to open Terminal.
  3. Type sudo update-grub and press Enter.
  4. Enter your password and press Enter.
  5. Reboot when done.

----MORE INFO----

While boot-repair does run update-grub, there are some cases where it actually breaks things. For reasons unknown, I find that I can fix these by running update-grub from the actual Ubuntu installation. I don't know why this is, but the solution works, so you can't complain. Anyway, good luck with your install, and I'm sorry you are having trouble so early on.

  • Incorrect, as Boot-Repair has already done update-grub (see line 1082 of Xeus log). Dillmo, please could you indicate cases where typing the update-grub command fixes a similar issue? – LovinBuntu Nov 24 '13 at 22:35
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Which menu item are you using. You have the version of os-prober that still creates BIOS boot chain load entries that do not work with UEFI. The bug has been fixed only in the very newest 13.10 with updates.

grub2's os-prober creates wrong style (BIOS) chain boot entry

https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1024383

Boot-Repair also has done the rename for "buggy" UEFI which often is not needed. I would undo that.

With the renamed file you cannot directly boot Windows from UEFI menu as it really is shim.

To undo & to rename files to their original names, you just need to tick the "Restore EFI backups" option of Boot-Repair.

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