Just thought I would mention on windows you just have to hit the PRT SCR button. You don't have to hit ctrl at all. Then you can paste it into any picture editor as the video says. As for Bill Gates being credited with the first computer virus, I have never heard that and the Wikipedia page for computer virus does not mention his name at all. Creeper in the early 70s was an experiment written by Bob Thomas. Elk Cloner was the first computer virus to appear in the wild written in 1981 by Richard Skrenta it attached to Apple DOS (ironic eh). The first PC virus to appear was created in 1986 by the Farooq Alvi Brothers to prevent piracy of their software.