Step 1 : Introduction to the question "A flawed software update from which company crashed millions of computers around the world last week?"
...Last week, cybersecurity company CrowdStrike distributed a faulty security update resulting in a historic outage that affected millions of computers running Microsoft Windows. This malfunction caused approximately 8.5 million systems to crash and become inoperable, marking the largest outage in the history of information technology. The disruption crippled health care systems, 911 lines, banks, and airports. As a result, airlines grounded flights, hospitals canceled surgeries, and retailers closed for the day. The financial damage from this global incident is estimated to exceed $10 billion.