Since you have a new computer, I'm assuming your video card is x16 PCI Express. Or at least you should have a slot for one, not the old style PCI. I have an ATI Radeon card 512 MB and it claims to be Windows Vista Ready, but I couldn't prove it since I am running XP. I still think if your desktop resolution is set too high it will affect how MOH starts, my opinion only. And my desktop is set at 1152 X 864. See if this helps.