Windows 7 install caused Grub boot menu disappear and can't launch ubuntu

I had windows vista and ubuntu 9.04 on my machine. Ubuntu has installed grub boot menu and it automatically detected windows vista installation and added it to the grub boot menu.

Now i installed windows seven and looks like it screwed up the grub boot loader. When i boot all i see in Windows Seven and Windows Vista from the boot menu (this is not grub boot menu). It is the windows boot menu. Now I can't even access or boot to my ubuntu.

How to fix this so that i can get my ubuntu back?

1 answers, votes, 7601 views

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asked by win7
2 years 17 weeks ago

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1 Answers

i am having the same problem here. every time a new windows version released they just overwrite other boot loaders. but never have these kind of problems with ubuntu. for example grub boot loader detects other operating systems and gives a decent menu to boot from. microsoft should follow this. - mahi 2 years 16 weeks ago

Answer

Best Answer

You have to reinstall grub boot loader to fix this. Reinstalling grub can be done in 4 easy steps.
Please follow these steps to reinstall grub boot loader

Boot your machine using Ubuntu Live CD
After the machine is booted and ready, Open a terminal window
Type sudo grub
Now type find /boot/grub/stage1
- You will get some output like (hd0,4). Yours might be different. But make sure you enter it same as it appears in the next step. For ex if your output is (hd0,2), enter root (hd0,2) in the next step
Enter root (hd0,4)
Enter setup (hd0)
Enter quit

Reboot the machine, Now your machine should boot using grub boot loader.
Have fun with ubuntu.
NOTE: While you enter grub> setup (hd0) your output might look like the following:-

setup (hd0)
Checking if "/boot/grub/stage1" exists... yes
Checking if "/boot/grub/stage2" exists... yes
Checking if "/boot/grub/e2fs_stage1_5" exists... yes
Running "embed /boot/grub/e2fs_stage1_5 (hd0)"... 17 sectors are embedded.
succeeded
Running "install /boot/grub/stage1 (hd0) (hd0)1+17 p (hd0,4)/boot/grub/stage2 /boot/grub/menu.lst"... succeeded
Done.

answer by Linux Rocks
2 years 16 weeks ago

If it says "command not found", just install grub using
sudo apt-get install grub and follow the instructions as mentioned above

- Visitor 16 weeks 2 days ago

this command def doesn't work any longer. I get the same error message "command not found" even with root permission.

- Visitor 1 year 19 weeks ago

yeah this def doesn't work any longer. it says command not found even with root permission.

- Visitor 1 year 19 weeks ago

I followed the instructions, it comes back with
sudo: grub: command not found
ubuntu@ubuntu:~$

- Visitor 1 year 26 weeks ago

I hav Asus K40in and i installed it in but it dosn;t work

- Visitor 1 year 36 weeks ago

Exactly what i was looking for, thanks much!!

- Visitor 2 years 14 weeks ago

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