Comment 12 for bug 402795

I encounter the same bug and using 'sudo update-grub2' command doesn't help at all!!
I have installed Windows 7 on my machine and the grub2 bootloader doensn't add it to the menu.

I've tried that command and it just added duplicate copies of the already Ubuntu, Ubunu (recovery) Memtest, menu entries.

And for some reason now I can't open the grub.cfg file in the default text editor... it just crashed. I already reported the problem but I don't what the cause is -> I'm new to Ubuntu/GNU/Linux world.

How can I manually add entries into the Grub2 bootloader? I'm not familiar with it.. in the older version of Grub there was menu.lst file but now you are not allowed to edit grub.cfg.