‘Blue screen of death’: Underlying cause of outage fixed, says Microsoft

A worldwide tech outage crippled industries from travel to finance on Friday before services started coming back online after hours of disruption, highlighting the risks of a global shift towards digital, interconnected technologies.

A software update by global cybersecurity firm CrowdStrike appeared to have triggered systems problems that grounded flights, forced some broadcasters off air and left customers without access to services such as healthcare or banking.