Microsoft says it estimates that 8.5m computers around the world were disabled by the global IT outage.
It’s the first time a figure has been put on the incident and suggests it could be the worst cyber event in history.
The glitch came from a security company called CrowdStrike which sent out a corrupted software update to its huge number of customers.
Microsoft, which is helping customers recover said in a blog post: “We currently estimate that CrowdStrike’s update affected 8.5 million Windows devices.”
In case you needed to another reason to switch to Linux.
Windows is so unreliable that even Microsoft runs Linux internally.
When this happened to Linux and MacOS users of Crowdstrike some time ago, no one cared.