[ubuntu] 12.04 installation succesfull but no user created

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http://ubuntuforums.org – Hi all, I've just reinstalled Ubuntu 12.04 on my pc but when I restarted it, there's no user defined : just a guest with no priviledges. So I'm unable to do anything .... My set-up was a dual boot with vista and Ubuntu 10.04 all starting with Grub nicely. I replaced Ubuntu 10.04 with 12.04 via a full reinstallation. During the process, I've run into troubles with grub which could not start and gave me a prompt. Probably a MBR error or badly defined boots. I solved this using boot-repair and Ubuntu 12.04 starts just fine. Problem now is that the installation was supposed to create a user bu (Hardware)