Many businesses are now dealing with backlogs and missed orders that could take days to resolve.<\/p>\n
Health services in Britain, Israel and Germany also suffered problems, with some operations cancelled.<\/p>\n
The global chaos has sparked concern over the vulnerability of the world’s interconnected technologies, and the extent to which a single software glitch could have such widespread impact.<\/p>\n<\/div>\n
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The issue began at 19:00 GMT on Thursday, affecting Windows users running cybersecurity software CrowdStrike Falcon, according to Microsoft, though the full extent of the problem only became clear by Friday morning.<\/p>\n
But by Friday evening, the problems were easing in many parts of the globe, with many airports saying that while there were still issues with check-in and payment systems, most flights were now running. Hong Kong International Airport has resumed normal operations, according to Chinese state media. <\/p>\n
Meanwhile, JP Morgan Chase, the biggest bank in the US, said it is working to restore service to ATM machines. <\/p>\n
The website Downdetector, which detects sites which may be having tech issues, showed fewer sites in the UK which were experiencing problems by the end of the day.<\/p>\n
CrowdStrike CEO George Kurtz said on X that a defect was found “in a single content update for Windows hosts”.<\/p>\n
“We’re deeply sorry for the impact that we’ve caused to customers, to travellers, to anyone affected by this, including our company,” he told the NBC network.<\/p>\n
“Many of the customers are rebooting the system and it’s coming up and it’ll be operational.<\/p>\n
“It could be some time for some systems that just automatically won’t recover, but it is our mission… to make sure every customer is fully recovered.”<\/p>\n<\/div>\n
Watch: Blue screens, queues and airport delays worldwide<\/figcaption><\/p>\n\n
Microsoft has also said that several reboots may be required, with some users reporting that as many as 15 could be needed before the problem is fixed.<\/p>\n
Also, tech experts say CrowdStrike’s fix will have to be applied separately to each and every device affected.<\/p>\n
Questions are likely now to be raised about CrowdStrike’s influence as one of the largest operators in the cyber-security market and the wisdom of having such a crucial part of the industry controlled by just a small number of companies.<\/p>\n
CrowdStrike’s shares fell by around 12% on Friday, at the expense of rivals SentinelOne and Palo Alto Networks.<\/p>\n
The problems were first noticed in Australia, and possibly felt most severely in the air travel industry.<\/p>\n
Airports saw delays, with long queues as flights were cancelled or delayed, aircraft grounded and passengers stranded.<\/p>\n
Some saw extra staff drafted in to check in passengers manually.<\/p>\n
By 18:00 GMT, aviation data from Cirium suggested that more than 4,000 flights – or 3.9% of the total – had been cancelled so far on Friday, though the figure may also include flights cancelled for other reasons.<\/p>\n
Payment systems, banking and healthcare providers around the world were affected.<\/p>\n
It is thought the outage may also have a longer term effect as companies struggle to pay wages to staff, particularly where payments are made on a weekly basis.<\/p>\n
Some railway companies warned of delays, and broadcasters Sky News and ABC Australia both experienced outages.<\/p>\n<\/div>\n
<\/div>\n
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