I happen to be one of the guys that purchased the RealFlight G4.5. Before I did I contacted Dell and told them the system requirements that I needed and they told me I was all set, it would work with my PC. Like some of you that mentioned the price I agree that it's expensive but it's a great program. I've been flying it for more than a month now and consider it $200 well spent. I'm know there are more programs out there but I don't know much about them. Good luck.