 Banks, even hospitals, had to cancel surgeries and they're having issues with appointment systems. The cybersecurity firm CrowdStrike says it all happened because of an update for computers running Microsoft Windows. It failed, but it was not a cyber attack. CrowdStrike says they are working on the patches needed. They hope to have everything back to normal or something close to it by Monday. But what can be done to prevent this in the future? We asked Axios tech reporter Maria Curie.