Gears of war problem

[Eddie168]

Please help. .
When atempting to start Gears of War after installing I get the following
error:
To run Gears of War with your current hardware setup, you must install the
following software update or updates:
+ ATI Catalyst driver revision 8.411.0.0
If you do not install this software, at some point the game will stop and
your progress will be lost. But i could not find ATI Catalyst driver revision 8.411.0.0 anywhere can anyone help?

thx