What actually happened inside the CrowdStrike update to cause a worldwide IT breakdown?

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What actually happened inside the CrowdStrike update to cause a worldwide IT breakdown?
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One configuration file that updates multiple times a day was the cause behind a system crash that spread worldwide.

The update to the Falcon sensor program, run by US company CrowdStrike, caused a coding error that sent millions of Windows computers worldwide to a "Blue Screen of Death".The company says they fixed the issue within hours of it arising but some users are still experiencing issues with their devices.One company and one tiny software update are at the centre of a global IT outage that engulfed millions of people, businesses and organisations on Friday.

Falcon sensor is a cybersecurity program that provides partially automated protection from malware, antivirus support, incident response and other security features. A logic error means a mistake has been made in coding, and has caused a bug that can then cause the program to malfunction.

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