[SOLVED] Downloaded MW2

Hi people.

I have a question.
I torrented Call of duty MW2 but still only the campaign mode works.
If I want to play online it say:
Steam must be running online to play multiplayer (Or something else)
I wanted to use the No steam patch but it is full of virusses and before thanx that shit my pc crashed.
So have someone a non steam patch WITHOUT virusses?
Or something else to fix this?

(Sorry for my bad English I'm young.)

Here you go ^^ thank me if i helped
/request solved