i really, really love this game (as a concept) but this one is a bit too hard for me. I played first and completed it almost without taking any hints from comments, but "morse code" (if it is indeed Morse Code) puzzle in this one eludes me >_<
I somehow managed to beat all the levels, and it was fun, but as frustrating as many other games of that type.
For those of you who're wondering what to do after getting the virus - press "X" as said at left-bottom corner of the screen.