I recently got a new motherboard and CPU. I read online that I wouldn't need to format my HDD, so I didn't. Apparently that wasn't correct, after i rebuilt my pc, I just got errors upon errors, so I removed my HDD's, but it in my brothers computer, formatted my boot drive and put Windows 7 on a USB stick. Now everything went fine until I was gonna install Windows. When I start up the computer with my USB in, it just says "Reboot and select proper boot device". Now, I have been in the BIOS and set the USB to be the 1st boot option - in fact, I've tried pretty much every connection I have available, but nothing seems to work! I formatted the USB to fat32, I copied my Windows files over to it, and I've tried every USB input I've got on my computer.