If you are receiving this message, your graphics card may not be compatible with Second Life.
Attempting to use Second Life with your current system configuration may cause the program to crash
or become unresponsive. Minimum system requirements are listed on the Second Life Support web site:
http://secondlife.com/support/
If you are using a supported video card, contact the
manufacturer to obtain video driver updates. Video driver
updates for ATI and Nvidia graphics products are available for download
from the following web sites:
http://www.ati.com/
http://www.nvidia.com/
Finally, try setting your display to "True Color
(32-bit)" under Control Panels, Display before running Second Life.