I have Windows vista 32 bit installed and i know that it is 64 bit compatible cuz it has had windows xp professional 64 bit installed. I wonder if i can dual boot windows vista SP1 32 bit and Windows 7 professional 64 bit. Both as swedish (sv-se). currently windows vista is primary. BTW the computer is a Dell XPS M1330 with Intel core 2 duo prossesor and Nvidia GeForce 8400M Video Card.