Businesses including banks, airlines, telecommunications companies, TV and radio broadcasters, and supermarkets have been taken offline following a mass global outage.
Major US airlines have been grounded.
The outage appears to be affecting Windows PCs globally. Users on the subreddit for cyber security firm Crowdstrike reported issues in India, the United States and New Zealand.
Users in Australia began reporting issues early on Friday, stating they had been locked out of their workstations.
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