Well my specs are a bit better than yours , only difference is i think i have a better processor and definantly a better gfx card ! Nvidia Gforce 555m 2gb , and even with all the options on the lowest i cant get 50 fps stable !! something is extremely wrong i can run ANY game on max FPS but not Black Ops 2 !!!
Something isn't wrong thats just a low end card. No way could you max anything from the last 3 years.