CrowdStrike has published a post incident review (PIR) of the buggy update it published that took down 8.5 million Windows machines last week. The detailed post blames a bug in test software for not properly validating the content update that was pushed out to millions of machines on Friday. CrowdStrike is promising to more thoroughly test its content updates, improve its error handling, and implement a staggered deployment to avoid a repeat of this disaster.

CrowdStrike’s Falcon software…