I see a couple sales ads from links here where you can get Windows XP Pro x64 for $75. Whats the catch? Can you get the service packs and all the updates with a "promo" version? I also see Windows XP Pro oem 32bit for around $104. Would I still be able to get service pack and updates for that? Also I am up grading to a am2 x64 processor and will play games so are there any advantages or disadvantages to using the xp x64 version. I have seen some answers previously and it seems it makes no difference if its the 64 bit version or the 32 bit version. 8O