This Friday, the world almost didn't wake up, due to a failure in Windows 365 terminals and applications from tech giant Microsoft. Companies such as banks, airlines, radio and television stations, and transportation lines reported computer stress.

Today it's the big topic worldwide, but the truth is that until then the explanations for the cause have been unclear.

Simply put, here's what happened: The ongoing outage was caused by a faulty cybersecurity update with CrowdStrike's Falcon Sensor software. Late yesterday (Thursday), Microsoft reported a problem that was affecting users' ability to access 365 services.

CrowdStrike deals with the security of many Windows PCs and services around the world. The last time there was a widespread Internet outage was in 2021, when a service called Fastly went down.

CrowdSrike's Falcon Sensor software is designed to protect systems against cyberattacks.

On Thursday, CrowdStrike alerted users to a Falcon Sensor-related bug that was causing Windows systems to crash with BSOD (Blue Screen Of Death) errors. Despite having reverted the faulty update, many machines are still affected.

The Blue Screen of Death, or BSOD, is a critical error screen on Windows PCs that stops all operations and displays an error message. This occurs when the system encounters a serious problem, often leading to an unexpected restart and potential data loss.