[PLEASE HELP]:(Combat arms error:( [HELP PLEASE]

Hello MPGH people.
I got a big problem
Whenever i try to play combat arms. It loads at first then i click "Game Start"
Then it comes up in the bottom right corner and loads the first logo.
And after the logo comes in the middle and it says
"Combat arms is already running, So shutting down client"
Please help!

Edit: I did CTRL + ALT + DELETE on the task manager.
Im virus scanning now
Turned off my computer for the night. Still doesnt work.
Sometimes it works but after when i exit CA it doesn't work for hours!
ANOTHER EDIT:I FOUND 1 VIRUS. THIS MAY BE THE PROBLEM!

Please help!
I hope its the virus that is the problem
Wish me luck
OMG 47 TROJANS! IT DELETED MY C:/ AND CA STILL DONT WORK!
AHH!

Wait for CA to close...
Then try again.

Or just restart your PC.

try reinstalling if re starting your comp does not work.

Did you download some dodgy hacks?

did u start ca as administrator

hey man i have a answer of your question please try this go to your combat arm folder in your computer. like go to my computer and go to local disc and click in nexon and click in combat arm and click in sitting and put your account no of your mpgh.com in setting like in the top it sayz account and password and click cross and click yes and for more information talk to me at zamir.007@hotmail.com