If you unwittingly download malicious software, your computer and even your smartphone could be locked, unable to do anything. It’s called ransomware, a type of malicious code that leaves its victims feeling personally violated. Some versions destroy your data if you don’t pay, while others merely threaten. Some will encrypt your device, scrambling everything it contains until you pay a ransom. Some versions of ransomware display a fake FBI alert and install child pornography on your phone.
Ransomware can be big business. Luckily, it can easily be avoided.
You can read more in an article by Seth Rosenblatt in the C|Net web site at http://www.cnet.com/news/your-computer-and-smartphone-held-hostage.