It's possible we are looking at the largest IT outage in history.More than 70% of the world's desktop computers run on Microsoft Windows software. A software update from cybersecurity company CrowdStrike has now taken a large number of those machines offline.The faulty code has led to global disruption with an economic impact that is as yet incalculable - but likely to be huge.Follow live: Major services across the world affected by outage The "Falcon Sensor" product designed to protect Windows ...