I'd check out adobe's site. I think they have a place to pay for a serial if you don't have one. If you've lost your serial, maybe check www.serials.ws or www.crackteam.ws
Don't install anything without running it through a virus scanner. I've never caught anything from either site, but you never know.
The invisible man is blind. If light passes through a body without being affected, then it cannot be properly refracted by the lenses. It won't be focused and he will constantly see a blur of random colors as lights hit the rods and cones from each direction.