System booting into 11.10 installation after installing 10.04

Question

I can't believe what happened. I had Ubuntu 11.10, I installed 10.04 a few days ago, I used it, everything was perfect. Today I installed WIndows 7, I opened Ubuntu and it loaded 11.10 not 10.04!!!! Please help me, my all files might disappeared!!! Please!!! :(

http://pastebin.com/e5v7zVqX

please add the results of the bootinfo script: http://sourceforge.net/projects/bootinfoscript/ — fossfreedom, Dec 23 '11 at 17:37
Did you try loading other Ubuntu versions present in the Grub menu? — Nitin Venkatesh, Dec 23 '11 at 17:40
wow that was fast... but you added the script itself - you need to run it! instructions here if in doubt... http://bootinfoscript.sourceforge.net/ — fossfreedom, Dec 23 '11 at 17:45

score 1 · Accepted Answer · edited Apr 13 '17 at 12:23

ok, from your sourceforge results you have the following situation (correct me if I'm wrong)

You have installed 11.10 as a wubi install inside windows.

Windows has taken control of the master boot-record and thus you are no longer booting with Grub2 but with the windows boot loader - hence you are dual booting just 11.10 and windows.

Your 10.04 install is installed in partition /dev/sda5.

My suggestion would be to reinstall Grub2 - I've reiterated what Scott has already written (adjusted for your situation)- please give some credit to Scott!

Boot from the live CD.
Mount your partition:
```
sudo mount /dev/sda5 /mnt  
```

Bind mount some other necessary stuff:

for i in /sys /proc /run /dev; do sudo mount --bind "$i" "/mnt$i"; done

chroot into your Ubuntu install:
```
sudo chroot /mnt
```
At this point, you're in your install, not the live CD, and running as root. Update grub:
```
update-grub
```
If everything worked without errors, then you're all set:
```
exit
sudo reboot
```
At this point, you should be able to boot normally.

By reinstalling Grub2 - Grub will then be updated with your Lucid/Windows & Oneiric installs - you should then be able to select which O/S to boot with.

Additionally, if you want to uninstall Wubi (the Ubuntu 11.10, in your case), you can do it through the "Control Panel > Programs and Features" (https://wiki.ubuntu.com/WubiGuide#Uninstallation). — Lie Ryan, Dec 23 '11 at 18:53
... ok - just to make very clear... I've copied scotts instructions into my answer but have changed sda2 to sda5 — fossfreedom, Dec 23 '11 at 19:07

System booting into 11.10 installation after installing 10.04

1 Answers1