My Dell Vostro 3700 laptop original purchase allowed me an update to win 7. I had separate 32-bit update and 64-bit win 7 updates OEM discs sent to me by Dell and updated it to win 7 32-bit. Then I put in 4 more megs of ram (now have 8) but realized that I can only use the original 4 unless I change to a 64 -it win 7. Can I easily use the other OEM win 7 update disc to install the win 7 64-bit version on my pc currently running the 32-bit version? If so, where can I read and follow specific "how to" guidance?