I just installed Ubuntu 12.04 LS alongside windows vista. I used a USB, I tried Ubuntu and then clicked on "Install Ubunutu 12.04 LS". I used the standard installation on an internal drive and chose a 85 gigabytes partition for Ubuntu. Everything seemed to go fine. I rebooted my system and got the error: error:no such device : random number grub rescue>
Therefore I don't have access to Ubuntu or to windows vista.
Any advice would be appreciated.