For some reason my bsp 3D perspective window is no longer able to be used. Basically it just shows the dark blue of the open space of the box. Even when the 3D map view comes into vision again it is no longer responsive.
The events that lead up to this were just reinstalling a video card (9800 GTX) that I had before which was my brothers, with one I got today. The same exact card with the same drivers. I don't see how putting in the same exact card can mess this up. Any help would be greatly appreciated.