Question

Why does my computer refuse to load Call of Duty 4: Modern Warfare?

Answer 1

Minimum requirements for this game to run are:

CPU:    Pentium 4 2.4 GHz/ Athlon 64 2800+ (Intel & Athlon 1.8 GHz Dual Core or better supported
RAM:    512MB RAM (768MB for Vista)
VGA:    3.0 Shader Support recommended. Nvidia Geforce 7800 or better or ATI Radeon X1800 or better
DX: DirectX 9.0c
OS: Windows XP/Vista only
HDD:    8 GB of uncompressed free hard disk space (plus 600 MB for Windows swap file)

The game has a redist folder in the installation directory. Install all those items, then try to run the game again.