Crowdstrike Outage: What We Know As Microsoft Accounts Down Worldwide

Major IT outage reportedly linked to the U.S. cybersecurity company Crowdstrike has caused chaos for businesses across the world.

The global software issue has forced many banks, airlines and broadcasters to go offline, and caused many Windows computers to crash suddenly.

In a post on its website, Crowdstrike said: "Crowdstrike is aware of reports of crashes on Windows related to the Falcon Sensor."

Microsoft has warned of a "severe degradation" to its services, but added that a number of its products had been restored.

Among the services still impacted is Microsoft Teams, on which users may be unable to access group chats. Microsoft Purview, Microsoft 365 admin center, Microsoft Fabric, and PowerBI are all still affected, the company said.

Commenting on the outages, Microsoft said: "We're continuing to progress on our mitigation efforts for the affected Microsoft 365 apps and services. We still expect users to see remediation as we address residual impact."

In the U.S. several major airlines including Delta, United and American Airlines grounded flights on Friday morning, according to the U.S. Federal Aviation Administration.

U.S.-based Frontier Airlines also said that the Microsoft outage had affected its systems. "During this time booking, check-in, access to your boarding pass, and some flights may be impacted," the company said on X.

The British broadcaster Sky News was temporarily unable to broadcast live on Friday morning, with viewers presented with an error message stating: "We apologize for the interruption to this broadcast. We hope to restore the transmission of Sky News shortly."

The British GP appointment system is also down. Newsweek has been told that doctors are currently unable to see patient notes, who is booked in for appointments or to prescribe electronically.