Firstly I'd like to apologize if this sounds like a question already asked but the answers given were of no any help :/
Here's my situation.
I bought a USB key with Ubuntu 12.04 LTS from Canonical.
I partitioned a HDD on which Windows 7 is.
Changed the booting order to 'external first'.
Inserted my new USB and installed Ubuntu.
Every time I want to use Ubuntu I just have to plug in the USB.
If I want to use W7 I just have to un-plug the USB.
So far so good, I love Ubuntu!
I want to stop pluging and un-pluging the USB.
I'd like to boot up and be presented with the GRUB on which I can just select what operating system I use without the USB as I do on another laptop I installed Ubuntu with a CD.
So I thing the right question is: how can I move the GRUB + Ubuntu installation from the USB to the HDD without loosing any file or customization?
Many thanks in advanced,