The July outage caused by the bug in the company’s Falcon software delayed thousands of flights, broke back-end systems and rendered laptops temporarily unusable.

The outage, which struck July 19 last year, was the result of a faulty update to CrowdStrike’s Falcon Sensor software running on Microsoft Windows systems. Distributed as part of a routine content push, the update led to widespread blue-screen errors and boot failures that affected critical infrastructure, airlines, banks and hospitals.

The cybersecurity company issued weaker-than-expected guidance and said its still feeling an impact from initiatives put in place after the July 2024 outage.