Run Ubuntuoff of a hard drive partition

How to run Ubuntu off of a hard drive partition?
if you installed it, you should have a grub menu when the computer first starts, and unless you change things it will automatically start in Ubuntu. So, if it doesn't (start Ubuntu), you didn't (install Ubuntu).

If it doesn't and you didn't, try reinstalling Ubuntu again - but FIRST, read up on the process so that you understand it and can follow the steps. Guessing can result in some serious, serious problems.