OpenGL support dissapeared!! Help

[doomjedi]

Somehow OpenGL support dissapeared from my comp - at least all the "Open-GL supporting" Doom Ports (Skulltag, GZDoom) suddenly offer me only software renderer, and none of the resolutions on OpenGL.....Nexuiz and others stall....

What could have happen? Did it happen to you before? How can I recognize the problem and fix it?

[MR_ROCKET]

Wow that's strange..It could be a number of things but the first thing that comes to mind is your video drivers. I'd say update your video drivers from the manufacture site or use windows system restore feature.
How it happened is hard to say, I'm thinking a possible file corruption on your hard drive? It only takes 1 bad spot on a drive, and in due time it will be rendered unusable.
Of course you may have recently installed something, that broke something, in that case, yeah try a system restore first.

If not then, I say update/reinstall your video drivers and directx.
Good luck.

Oh and btw, Doom3 Tech Support is a strange place for this question heh.