There could be many possible reasons, and possible solutions for that matter. If your computer is running parental controls, it may not be allowing your computer to run it. In my experience with parental controls, I could not play any FPS or full screen games while they were active on my computer. There may also be other interfierences but if that's not the cause, I'll need more information to help you further.
you cant the only controller that works with combat arms is the xbox 360.
You cant....
Internet maybe
To load maps faster in Combat Arms, you'll need to have a faster internet connection and/or more RAM (temperary memory -- internal computer hardware). An alternative is to have less programs running while playing combat arms as to not slow it down.
u cant
u cant put it in a window mode
No, it cant or else someone would of post that they have a virus
you cant or else you will get jailed
Either The Nexon messanger cant connect or there is a slight problem where you cant have certain friends
NA combat arms can be played in japan but need a REALLY good proxy, but i think you cant anymore but there is a combat arms Japanese now go check it out.
you cant the only thing is taking it to an Apple store and aksing them to Bootcamp
clean your harddrive