So I think I really messed up. I was trying to install Ubuntu 13.04 over 12.04 and accidentally hit install over. It brought me to the next screen where you choose where your located and it wouldn't let me go back. I rebooted my computer and now I only have one partition showing my old entire hardrive capacity. How do I get windows and all my data back. Why would Ubuntu just start rewriting over anything without confirming? There was no warning besides what was written under the option and I wanted to install it over 12.04 but not the entire disk. I am currently stuck using a live usb, but managed to download testdisk and am trying to run it, but it has been an hour and still says please wait. Is there any way to get my data back?