I need to get a new computer but the only game I want to play is Flight Simulator 2004.?

I need a new computer but I probably don't need much capacity except for using the Flight Simulator 2004. I guess it's requirements will drive the system's requirements?? I've had this game for a few years but my old computer will barely let me operate it; lots of shadows! Any help would be appreciated; I'm really looking forward to using the Flight Simulator so I'd like to get a system that will let me enjoy it.I need to get a new computer but the only game I want to play is Flight Simulator 2004.?
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