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Fix Windows Update ‘Authentication Failed’ or ‘Password Incorrect’ Error - Windows 10 ERR_SSL_PROTOCOL_ERROR Troubleshooting Guide-How to Fix Windows Security App Version Error

Updated 2026-06-13 19:05:21cloud-software

Fix Windows Update ‘Authentication Failed’ or ‘Password Incorrect’ Error - Windows 10 ERR_SSL_PROTOCOL_ERROR Troubleshooting Guide-How to Fix Windows Security App Version Error

Prepare

Execute

Validate

Document

Operational follow-up

Record the exact option, command, or setting that changed the result.
Keep a rollback note if the workflow affects shared files or team settings.

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