Hi, dumb questions: Does "x64" make a big difference and are the last 2 OSs the same except for the last one being retail?
Microsoft Windows XP Professional SP2
Newegg.com - Microsoft Windows XP Professional 64Bit SP2C - OEM
Microsoft Windows Xp Pro X64 Bit Operating System
If it matters, my build: https://secure.newegg.com/NewVersio...hListNumber=7098767&WishListTitle=courts+comp
Microsoft Windows XP Professional SP2
Newegg.com - Microsoft Windows XP Professional 64Bit SP2C - OEM
Microsoft Windows Xp Pro X64 Bit Operating System
If it matters, my build: https://secure.newegg.com/NewVersio...hListNumber=7098767&WishListTitle=courts+comp