Ask Ubuntu is a question and answer site for Ubuntu users and developers. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I've successfully installed Ubuntu 11.10 alongside Windows 7. During installation I've manually changed the Windows partition size ( there were 24Gb used, I've changed virtual partition size from 100Gb to 40Gb) and killed the 150Mb partition where Windows stores system recovery data. I've installed Ubuntu on second virtual partition.

So now when the GRUB starts it cannot see the Windows installer. I think it's all OK with windows loader, just GRUB does not know about it.

So I need to specify it manually. Where and how?

share|improve this question

Run this from Ubuntu:

sudo update-grub

And reboot.

Windows should be in the Grub menu now.

share|improve this answer
Really? If update-grub didn't find Windows when you first installed Ubuntu (or any linux distro) it's unlikely to do it now. – Auspex Mar 27 at 20:39
Running this command to find windows after first installing Ubuntu worked for me. – David Apr 29 at 14:53

edit Grub menu

gksudo gedit /boot/grub/menu.lst

# This entry automatically added by the Debian installer for a non-linux OS
# on /dev/sdb1
title Windows 7
root (hd1,0)
map (hd0) (hd1)
map (hd1) (hd0)
chainloader +1

edit /etc/fstab so windows partitions are accesible in linux:

sudo apt-get install ntfs-config

sudo ntfs-config

add mount points in /media for windows partitions

i think this will help you

share|improve this answer
unfortunately no file /boot/grub/menu.lst – Dan Nov 10 '11 at 13:58
These instructions do not work with GRUB 2 – Spookbuster Jun 7 '15 at 16:35

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.