Windows builds of Project OutFox use an installer; follow the instructions, and launch the game using the provided shortcuts.
%APPDATA%\Project OutFox
.If your log file (Installation directory/Logs) shows WDDM1.0 or WDDM1.1 at the end of the graphics card name (i.e. "Intel(R) 82945G Express Chipset Family (Microsoft Corporation - WDDM 1.0)") or the log shows "Microsoft GDI" as the renderer, then you are running the OpenGL-crippled "Windows" driver that is downloaded on a fresh install. Project OutFox will not work on these drivers, as we do not support DirectX anymore (the old D3D renderer that 5.0.12/5.1 has) There is a list of drivers at here but for some of these cards, you need to keep your Windows 7 install disc handy!