 Fox's Brian Yenis in Butler, Pennsylvania. Two other men who were shot remain in serious but stable condition. A faulty software update being blamed for a worldwide computer outage that grounded flights, forced hospitals to cancel surgeries, and shut down local governments. Cybersecurity firm CrowdStrike says an error in a system's update for Microsoft Windows caused the chaos, not hackers. Some police departments said their 911 call systems were temporarily down.