U.K. Health Service, Hit by Hack, Ignored Advice for Months By STEVEN ERLANGER, DAN BILEFSKY and SEWELL CHAN The National Health Service was repeatedly warned about its out-of-date and vulnerable systems before it suffered a devastating cyberattack on Friday. https://www.nytimes.com/2017/05/12/world/europe/nhs-cyberattack-warnings.html Windows XP?