So my friend told me that on her msn messenger that apparently her computer was sending files to people she was talking to, though she didn't send any........and it wasn't just on one name, she go on her other msn e-mail and it was sending files to the people she was talking to on that name as well, so it's her whole messenger.

Can anyone help me figure out how to stop this?

And she has spam/virus blockers on her computer.