Opengl & Windows 2000 - Textures look 'blurry''

I am running Windows 2000, with an ATI Rage Pro Graphics card, running Quake 2 in opengl mode. In Windows 98, Opengl is perfect. Running it in Windows 2000, it is less from perfect. Although it runs, the textures such as walls and floors seem very blurry, with no real definition. I am pretty sure it’s something to do with ATI drivers of some kind, but have all the latest drivers installed, maybe the drivers are far from perfect? Any info on this problem is appreciated.