I just downloaded and installed ezQuake and when I went to run it for the first time I got this error:

GLW_StartOpenGL() - could not load OpenGL subsystem.

I didn't see this in the FAQ so I figured I'd just post.

For a computer I have:

P4 3.0ghz
ATI Radeon X300
Win XP Media Centre

I've just tried to reinstall the video drivers and I had no luck.

Any thoughts or info still needed let me know.

did you try with the nquake package?

http://nquake.sf.net

i just had the exact same prob on my neighbours comp today and i fixed it by installing proper gfx drivers.
you sure you installed the driver correctly? (uninstall old first etc.)

open_GL is a problem with the GFX adapter. You need to either find the latest drivers for your video card or maybe even upgrade to better GFX.

i'll try the drivers once again, and yes I tried with nQuake