Hi everyone, this is my first time trying BT so please bear with me. I'm trying to install BT4 as a dual-boot on a laptop currently running Windows 7. I downloaded the BT4 Final .iso and verified that the md5 hash was correct. Burned the .iso to a DVD and also to a USB key with UNetbootin. The problem I'm having is that whenever I try to boot BT so I can install it I get this error: Missing operating system, it happens with both the DVD and the USB key. I appreciate any help or suggestions.