I am running Windows XP and all security codes and operating windows are current and up to date. There is nothing wrong with my operating system. When you click on some of the "supposed" .JPG files mentioned it is not .JPG files at all. It is a false link to bring up the web pages of various sites. When these web pages load on a computer for viewing they automatically attempt to install trojan horse virus programs and "dialers.
You are warned to stay away from them. If you choose to go to them, go ahead and learn the hard way.