COD WAW 2 profiles help

[sunderland]

went to have a game of COD today and it came up Newkyboy online but im not that username so went into my profile and it was there with my username so everytime i log on its this newkyboy that comes up,have i been hijacked as ive done a scan with nod and avira and sybot and it still comes up any help please

 

[mleanz1]

The online profiles are done with CD keys! So if youve given someone your key then a profile would be matched with you CD. Alternatively if you left you PC on your lil bro could have went on and created an account!

 

[sunderland]

ive deleted it and then i put my profile in now its coming up saying that the key is in use with another pc,yet ive been playing it since day 1 with the key i got with the game