Can't play or reinstall on Win 7

[Drakeero]

Hey guys, new computer of much awesome time. Problem is its running windows 7. When I try to run the game off of an external hard drive the computer gives me the "thinking" mouse icon for a moment before doing nothing. Same with the installer from the main web page. Double click it, "thinks" for about a second then goes on as if nothing has happened.

Since I haven't really seen anyone else complaining, I figure I'm just missing some magic trick somewhere. Can anyone help me?