Cd key in use!

[CrazySerb 1]

Ok guys, i was playin last night,up to late,no problems,today when i tryed to join server i couldnt, msg was "cd key is in use"! After reading for a while i am asuming somebody hacked my cd key,profile or whatever,now i joined again,started game when msg pops up "something went wrong,disconect and try again"!

Is there any chance for me to save my cd key,to protect it that no one else can use it?

[ZeroPointOne 1]

Dont try to download hax nex time

[CrazySerb 1]

I downloaded cheats and i am here to ask about problem,are you that stupid,pls dont reply if you dont have something smart to say!

[Frank Irony 3]

Is there any chance for me to save my cd key,to protect it that no one else can use it?

I don't think so.

[freaky88 13]

your cd key is gone, sorry. It was a keystealer