Alva Review-Courier -

LOS ANGELES (AP) — Computers around the world were locked up and users' files held for ransom in a cyberattack Tuesday that paralyzed some hospitals, government offices and major multinational corporations.

Here's a look at how malware and ransomware work and what people can do if they fall victim to attacks.

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WHAT IS MALWARE AND RANSOMWARE?

Malware is a general term that refers to software that's harmful to your computer, says John Villasenor, a professor at the University of California, Los Angeles. Ransomware is a type of malware that essentially takes over a computer and prevents users...