I have a gigabyte P35-DS3L mobo that has been relatively good to me for 2+ years w/ XP Pro. I am trying to install Windows 7 Pro from a Lexar thumb drive. The system refuses to boot from it no matter where I set the bios. I read everything I can find online, formatted the drive a number of ways (FAT16, FAT32 w/diskpart, FAT32 w/ HP usb disk format utility) and nothing works. The bios recognizes the thumb drive; I have even set it to have priority over the hard disk and removed the hard disk altogether from boot sequence. The usb drive barely flashes then the system defaults to the hard drive instantly. Has anyone had luck with this?