Sorry to hear you are having issues. This message is displayed when hardware acceleration is not available on your video card. Since you successfully ran the program on Windows XP you should be able to do so on Windows 7 too, just make sure you install the correct video card drivers. We also rely on DirectX for rendering, so you might want to check if you have that installed (typing in “dxdiag” in cmd should open a window telling your DriectX version and other hardware info).
Please let us know if you need anymore help with this, or if the above didn’t work. Thank you!