I just built a new rig with an ASUS P6T mobo, and whenever I leave a flash drive in the USB plug or an external hardrive plugged in, and the start the computer, it attempts to read the OS off of those devices when there isn't one. Also, when I go into the BIOS when those devices are plugged in, it reads them as the primary boot device, and does not list my main HDD which is a velociraptor. IDK why it is doing this, please help....