Can someone help me

i know most of u havent seen me for a while i got a new comp and when i alt tab or anything to get out of combat arms besides exit it freezes when i try to get back on

only 1 explanation i guess , you havee one hell of a shitty new pc . no flame intended.

lol my mommy just got one of those yesterday

what exactly happens when you come back on?

for me sometimes my screen just permanately goes black, but i can still hear music

This always happens to me. I have a Vaio NS and everytime I alt+tab and try to go back in Combat Arms, I just see a black screen. I don't know why it happens though.

heres how you fix that:
way 1:re install ca people dont know this but sometimes during patches or first dl some files that reduce freeze in game or lag get deleted or moved. try re installing the game.
way 2:If re instal does nothing get the game booster that somone posted awhile ago it will reduce lag greatly and opens ca faster after you alt+tab out. I can re post it if somone tells me how :P.
way 3: if nothing works then the fastest way to end the game is to press ctrl+alt+delete. this will open tast manager and then you just end the process and ca will be closed.
also try to not alt tab out try pressing the flag button if you got pc between ctrl and alt or alt+esc. Those work mildly differently.
The main reason for that freeze is because of your low ram or bad graphics cards. gl ^^