Problem: i can't boot both Ubuntu and Windows.


  1. I just installed Ubuntu 14.04 LTS 64bit and Windows 7 64bit on my Lenovo Y500 with UEFI Legacy Support mode enabled and did update-grub (GNU GRUB 0.97).
  2. on sda there is installed grub and Windows MBR.
  3. on sdb reside the installations of Windows 7 and Ubuntu
  4. i tried boot-repair restore MBR: restores windows boot but i can't boot to grub.

  5. i tried boot-repair recommended: can't boot windows 7 from grub menu entry for windows 7. It just shows a black screen without any movement directly afterchoosing the entry. The fan starts to run high. can only boot Ubuntu from grub.

Question: How can i make Grub2 boot windows properly?

This setup worked once with Ubuntu 13.04.

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