Check if your computer meets the minimum system requirements to play Call Of Duty - World At War:
- OS: Windows XP / Windows Vista;
- Processor: Intel Pentium 4 / AMD 64 3200+ with 3.0GHz or better;
- RAM: 512MB RAM (XP)/1GB RAM (Vista);
- Video Card: Shader 3.0 or better, 256MB Nvidia GeForce 6600GT/ATI Radeon 1600XT;
- Free Disk Space: 8 GB.
If the requirements are fulfilled, update your video card drivers, restart your computer and press the F2 key to open the Bios settings. Go to Ai Tweaker, select DRAM Bus Voltage and change the Auto entry to 1.65 value. If this doesn't solve the problem, try to reinstall the game.