For you what is you IOS for your computer,
1. Reinstall combat arms.
2. if it doesn't work, on the combat arms main link on your desktop, right click and press properties. then after, click compatibility. After you should see that it doesn't have a tick in the box in compatibility mode. Press it, then press windows 95. what ever you do DON'T CLICK THE TICK BOX AGAIN. then press apply and ok. Start CA and it should work..
PS./ EVERYONE.. ANYONE THAT NEEDS HELP WITH CA I CAN HELP JUST PM ME PRIVATELY.... XD OR POST IT AS A REQUEST...