In order for you to play Armed and Dangerous on Windows with minimal graphics settings, your computer must meet the following requirements
OS *:
Windows 2000, XP or Vista
Processor (CPU):
Pentium III 1GHz or AMD Athlon 1GHz
Memory (RAM):
256 RAM
Graphics Card:
32 MB 3D graphics card with Hardware Transform and Lighting (T&L) Compatibility
DirectX®:
DirectX 9.0b
Hard Drive:
4.5 GB of free hard drive space
Sound:
100% DirectX9.0 compatible Audio Device