Yes, the game runs on windows 8.1, but if it decides to derp out, you can downgrade to windows 7 vista, by going here. (http://www.crn.com/slide-shows/applications-os/240155734/how-to-downgrade-from-windows-8-to-windows-7.htm) The pages explain how to downgrade from windows 8.1 to 7. Hope this is if use^^ And the graphics card is great in a HP ;3
~ Whisper