If your Counter Strike gameplay has been rudely interrupted by a fatal error message that indicates that your available memory is less than 15MB, there's no need to panic. Most times, this error message arises when you try to run the game on a 64-bit operating system.
Here is a quick and simple way to resolve the Counter Strike fatal error.
Resolve Fatal Error on Counter Strike
Right-click on the game shortcut, and choose Properties > Compability.
Check Run this program in Compability mode for, and then choose the Windows XP SP2 option.