Possible Duplicate:
How do I set up a dual boot Windows and Ubuntu?
I installed Ubuntu 10.10 alongside Windows 7. I was able to upgrade to version 11.04. Now I'm trying to update to version 11.10 but I get an error message saying it is not possible to upgrade.
I decided to install a partition, but when I start the PC I don't get a grub screen that lets me choose which OS to boot. I formatted the partition where I installed Ubuntu, I've been looking for tutorials where you learn how to install Ubuntu on a partition part to try to understand the problem.
I wonder if anyone can explain how to install Ubuntu on a partition an existing partition, so that when I boot the PC I see the grub menu that lets me choose which system I want to start.
