Low Graphic
Use Gameboster
Yeah, I have the same thing for MW2.
Remove the space.
It sounds like you definitely aren't running the a good PC... I got the currently best AMD processor and my graphics card is around 1/5 of the current best one. And i can record and play BO at full quality with all the settings highest possible. So you are not running one of the best PC's.
The best solution is for sure to get some new hardware. And if you can't afford that you should just lover your settings. You can't boost your FPS if it is lagging. There is a reason the FPS isn't higher than it is.
I think you should lower the resolution and use Gamebooster
If you turn down everything and it still lags then there's nothing else to do besides upgrade your hardware.
it is just your pc you know
if you have a good pc it will not lag even if you have a low fps it only doesn't play smooth and when you pc sucks it will lag even on 20 - 30 fps
Lower texture quality, resolution. Gamebooster, Ccleaner, and Advanced System Care all make your system faster too.