Talk to Ted Simpson. He'll give you a code for disabling the
virus. With your character who's carrying the EMP device,
sit in the VR chair by clicking on it. You'll go into VR.

IN VR
Listen to the virus doing his scare dialog and then use the
EMP device (that'll shut him up! :-) ). Push the computer
panel at the left of the screen and everything will blow up.
You'll go back into reality with your other character and
the game is over. It's got a pretty cheesy ending. A lot of
people are bitching about that.

Ta-dah! You've won!