Microsoft Issues Emergency Windows 11 Fix for Microsoft Account Sign-In Failures
Microsoft released an out-of-band update for Windows 11 (KB5085516) on March 21, 2026, to address a sign-in regression introduced by the March 10 cumulative update (KB5079473). Affected users reported being unable to authenticate into apps using personal Microsoft accounts: despite an active internet connection, the sign-in flow incorrectly displayed a “no Internet” error and blocked access to Microsoft services such as OneDrive and Microsoft Teams Free. Background and scope The…