Well, I'm not sure how to get into the BIOS on my motherboard, it's a special MSI-HP manufactured motherboard that HP puts into their computers:http://bizsupport1.austin.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c01946060&printver=true
But anyhow, is there any other way I could make my PC boot from my 1TB because when I unplug my 640GB it boots perfectly from my 1TB, but when I have both plugged in, it automatically boots from the 640GB. I want to be able to boot from my 1TB and then erase everything from my 640B to use it for storage. Any suggestions for that? And if I did go into the BIOS, what where would I need to go to make it boot from the 1TB? (And no, I don't have another hard drive to boot from, these are my only two.