I probably did something really stupid. My primary hard drive on my laptop was getting full so I decided to install Ubuntu 12.10 on an external hard drive.
When I have the hard drive plugged in, I am first presented with the Grub screen where I have to option to boot in Ubuntu or Windows. Everything works fine with the external drive plugged in but when I try to boot without it, I get a
grub rescue screen and can't do anything.
I believe my problem is that the computer first looks for the Grub menu and can't find it. It then freezes up and is unusable.
Is there any way to get past this problem so I don't have to carry my external drive around all the time?