The global ransomware attack called “WannaCry,” which began last week and continues today, could have been avoided, or at least made much less serious, if people (and companies) kept their computer software up to date. The attack’s spread demonstrates how hundreds of thousands of computers in more than 150 countries are running outdated software that leaves them vulnerable. The victims include Britain’s National Health Service, logistics giant FedEx, Spanish telecom powerhouse Telefonica and even the Russian Interior Ministry.
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