Broke 0.6 Vistas Fixed officially acknowledged Mar 10, 2026 their #31 worst broke on record

The update that logged you out of everything, then blamed the internet

March 2026 update broke Microsoft account sign-ins across apps

↳ caused by KB5079473 ↗

The market's verdict: -2.3% on MSFT in the week after.

Status: Fixed. Working as intended, eventually.

What actually happened

The March 10, 2026 security update broke Microsoft account sign-ins in Teams, OneDrive, Word, Excel, Edge, Xbox and Copilot apps, cheerfully informing users that their device was not connected to the internet, which it was. Microsoft confirmed the issue on March 20 and shipped an out-of-band fix on the 23rd. Ten days of being told the problem is your Wi-Fi, from the company that makes your Wi-Fi drivers' favorite operating system.

This one is officially acknowledged.

Were you affected? Unbreak it

Out-of-band fix KB5085516 ↗

Windows Update → Check for updates, or download KB 5085516 from catalog.update.microsoft.com.

Timeline