I ran this on Windows 7. The main logo is white and half the characters are white solid blocks too. I think it's not a W7 problem, I think you've got some textures in there that are not power of 2. ie. 2,4,8,16,32,doubling in width and height. OpenGL only guarantees support for those size textures, but non-power-of-two (npot) work on some drivers, mostly nVidia.
Jim