KB5079473 Chaos: How a Windows 11 Patch Locked Out Teams, OneDrive and Personal Accounts
A routine March cumulative update meant to keep Windows secure instead produced a glaring user-impacting regression. After Microsoft pushed KB5079473 (OS Build 26100.8037) on March 10, a subset of Windows 11 devices began failing to sign in to consumer Microsoft services. The result: personal OneDrive syncs stopped working, Microsoft Teams Free users could not authenticate, and Office features tied to personal Microsoft accounts were effectively blocked — all while devices…