You have a virus!!!!

Please, Please, Please!!!!! When there is a popup that appears on your screen and tells you there are viruses on your computer and you should run some software that is not installed on you computer. Don't believe it! It's not true! "They", (the mystical cloud) are trying to sell you something and are not really trying to help. I have uninstalled plenty of programs on plenty of computers to know this tactic works and will only stop working if "we" (royal we) could stop falling for it.