Malicious software called 'ransomware' has forced British hospitals to turn away patients and affected Spanish companies such as Telefonica as part of a global outbreak that has affected tens of thousands of computers.
What is WannaCry — also known as WanaCrypt0r 2.0, WannaCry and WCry?
HOW DOES IT WORK?
WannaCry is a form of "ransomware" that locks up the files on your computer and encrypts them in a way that you cannot access them anymore.
HOW DOES IT SPREAD?
Ransomware is a program that gets into your computer, either by clicking on the wrong thing or downloading the wrong thing,

)