Getting a new computer

[Sargent Q]

Just use the same CD key for Warband.  The Characters are tied to the CD key.  If you have Warband through steam its easy to do so.  Just install steam and than Warband on the new computer.  It might require you to enter a key code still,  but it will give you the one from the steam library for that account.  If you don't have it through steam,  You will need to find your key code and enter it in when you install the game.