I'm new here.
I see on Dugi's World of Warcraft Guide:
A series of servers operates World of Warcraft. The server location, or in WoW language known as 'Realms', is differ depending on where you are. The realms positioned globally and you just need to connect to whichever realms local to you. This will make your the game faster and more reliable. But don't worry. World of Warcraft realms are very reliable and well maintained. Another reason why WoW is the leader in MMORPG.
So, how to create a MMO server?
Oh I've tell you, that my computer running Windows 7 Professional SP1.
Do you know anything about networking?
This sounds like the real question is "How do I make a WoW server emulator?"
Let's just say the legality of those is in a bit of a gray area, and I doubt you'll find much help here.
If the question is "How do I make my own MMORPG?" then I direct you to this posting.