Pedophiles can exploit virus-infected PCs to remotely store and view their stash without fear they’ll get caught. Pranksters or someone trying to frame you can tap viruses to make it appear that you surf illegal Web sites.

Whatever the motivation, you get child porn on your computer — and might not realize it until police knock at your door.

An Associated Press investigation found cases in which innocent people have been branded as pedophiles after their co-workers or loved ones stumbled upon child porn placed on a PC through a virus. It can cost victims hundreds of thousands of dollars to prove their innocence.

Their situations are complicated by the fact that actual pedophiles often blame viruses — a defense rightfully viewed with skepticism by law enforcement.