If I have windows 7 64 bit installed, what should I install for XP Mode, 64 bit or 32 bit? and which Virtual PC, 64 bit or 32 bit? Whatever I have read so far, Microsoft states that XP mode provides a 32 bit environment in XP mode. How is that possible when I install both in 64 bit. Any help in explaning this whole XP Mode will be greatly appreciated.