 The update was faulty, so any computer or system that installed it stopped working. The Australians were the first to report problems because in their time zone, their business day started many hours before ours. And then, of course, the problems appeared to spread. The issue has been identified, isolated, and a fix has been deployed. Cyber security firm CrowdStrike, which provides antivirus software to Microsoft's Windows devices, says the incident is not related to a cyber attack.