LONDON — A global "ransomware" cyberattack, unprecedented in scale, had technicians scrambling to restore Britain's crippled hospital network Saturday and secure the computers that run factories, banks, government agencies and transport systems in many other nations. The worldwide effort to extort cash from computer users spread so widely that Microsoft quickly changed its policy, making security fixes available for free for the older Windows systems still used by millions of individuals and smaller businesses. A malware tracking map showed "WannaCry" infections popping up around the world.
Ransomware attack circles globe
'WannaCry' infection attempts to extort cash from computer users


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