I just built my first build and the BIOS is running fine and everything but once I try to install windows 7 from a USB external hard drive lines appear on the screen and freezes. What happens is the start up logo gets cut off and it goes to the next screen but with different color lines on it. This is when I'm plugged into my mobo. When I'm plugged into my GPU it gets through the start up logo but then doesn't bring up the setup box. I tried both options repeatedly but no success. Any advice on either problem would help.