A major IT outage caused ripple effects across the globe on Friday, as many workers awoke to find the now-infamous “blue screen of death” on their computers when they tried to start their workdays. The outage was reportedly caused by a glitch that occurred during an update to CrowdStrike Falcon, a cybersecurity detection software platform that runs on Windows operating systems.

While CrowdStrike has been clear that the incident was not a cyberattack, the disruption has been massive, impacting industries from airlines to hospitals to media.