Counter Strike 1.6/Source/Condition Zero "Display Frequency out of range"

Counter Strike 1.6/Source/Condition Zero "Display Frequency out of range"

Sometimes after changing the video settings>Screen resolution, you often say oh shit! and that is because you get the error like "Display Frequency out of range"...

So! follow the steps below to fix the frequency problem

1: Go to the properties of your counter-strike 1.6/source/condition zero icon
2: Type "-gl -w 800" at the end of the target.

Now you can start the game without receiving the "Display frequency out of range" error