Open GL crashing

Every time I try to open a game that uses Open GL it crashes. This is the error:

…WARNING: fullscreen unavailable in this mode
…shutting down QGL
…unloading OpenGL DLL
…assuming ‘3dfxvgl’ is a standalone driver
…initializing QGL
…WARNING: missing Glide installation, assuming no 3Dfx available
…shutting down QGL
----- CL_Shutdown -----
RE_Shutdown( 1 )

GLW_StartOpenGL() - could not load OpenGL subsystem

Can you help me?

You almost certainly need to install new graphic drivers for your card.

NVidia:
http://www.nvidia.com/content/drivers/drivers.asp

ATI:
https://support.ati.com/ics/support/default.asp?deptID=894&task=knowledge&folderID=27

INTEL:
http://support.intel.com/support/graphics/

SIS:
http://www.sis.com/download/

VIA:
http://www.viaarena.com/Default.aspx?PageID=2

S3:
http://www.s3graphics.com/drivers.jsp

> WARNING: fullscreen unavailable in this mode

This usually means your monitor doesn’t support the resolution that quake3 (guessing based on the message) is set to use. Try editing the config file by hand.