Originally Posted by
NameisToad
The userpreferences.ini file is in the 'My Documents\Dungeons and Dragons Online - Stormreach' folder. I don't know of any reason why having your 'My Documents' folder on another computer should change anything as long as you have permission to edit files there, but TheBoz usually knows what he's talking about.
Resolution and many other settings are stored in the userpreferences.ini file, so maybe you just need to hand-edit it in notepad and then run the game with whatever settings you like?