Microsoft has taken the extraordinary step of providing an emergency update for unsupported Windows XP and Windows 8 machines in the wake of Friday s WannaCry ransomware outbreak. Microsoft acknowledged the dire straits many of its customers were in, and rolled out a patch for all computers that were not protected by the March update. This decision was made based on an assessment of this situation, with the principle of protecting our customer ecosystem overall, firmly in mind, Microsoft said last night.
Source: https://threatpost.com/microsoft-releases-xp-patch-for-wannacry-ransomware/125671/