A global IT outage on July 19, 2024, caused by a faulty software update from cybersecurity firm CrowdStrike, led to widespread disruptions across various sectors, including airlines, hospitals, banks, and businesses. The update triggered 'Blue Screen of Death' errors on Microsoft Windows systems, causing an endless reboot cycle and service failures. Major airlines grounded flights, hospitals canceled appointments, and businesses faced significant operational challenges. This incident underscored the vulnerabilities in tech-dependent systems and the need for robust contingency plans. While CrowdStrike has issued a fix, full recovery is expected to take weeks. Experts warn that similar disruptions are likely unless better backups and contingencies are implemented.