You can get this mission by going to Lester's house, which is marked on your map with a "L". In order for Lester's plan to work, you'll need some new clothes, so head over to the Suburban store to get some new clothes. When you get there, the lady working the cash register suggests some, so go over and buy anything.
With your fashion sense upgraded, drive to the Lifeinvader office. When you get there, go to the back door and wait for someone to come out. The programmer will let you in and wants you to do something for him, so follow him until you get to his desk.
It seems he was doing some browsing on his computer, so keep closing the popups by clicking on the Xs in the upper right corner. Note that more will keep appearing, so it might take a minute or two to close them all. When you get to the desktop, click on the antivirus program. Run it and the guy's computer will now be clean.
Thankfully, the guy is an even bigger idiot for telling you where the prototype is located. Head into the room and Michael will automatically rig it, so leave the building after that. Go back to your house and into the TV room. Change the channel until you get to Weazel News, then wait until Jay Norris takes out the prototype. Once he does, bring up your phone, go to Contacts and call him to watch a scene. Mission complete.