right, so i recently recieved a legit copy of Windows XP Professional but i was informed that the cd key it came with was special, and could only be used once, and i shouldnt tell the key to anybody. that doesnt make sense if i can only use the cd key once... eventually i was told that it was an "enterprise edition". for big corporations? i dont know. i also got a copy of microsoft office xp 2003 which is apparently also "enterprise" is there really a difference between this edition and standard XP Professional? can i use the cd key more than once? Alos, i have a new Asus motherboard (PWD52) and i heard something about ...ACPI? which i believe my motherboard probably supports. when i install this new edition of XP, would it be beneficial to me to configure ACPI? what does it actually do?