Hi , if you want make your quallity lower - here is the solution
Go to - My Documents/BFBC2 and open Settings.ini
Effects=low
Soldiers=low
Vehicles=low
Overgrowth=low
Undergrowth=low
StaticObjects=low
Terrain=low
Shadows=low
Bloom=false
HSAO=false
MSAA=0
Water=low
MainQuality=low
Texture=low