TLS keeps unchecking itself or SSL 2.0 keeps re-checking itself

windows

Symptoms

In IE Advanced options, TLS settings revert immediately.

Likely cause

Antivirus (commonly McAfee) is rewriting the settings, or the IE configuration is corrupt.

Fix

1. IE > Tools > Internet Options > Advanced > Reset (under 'Reset Internet Explorer settings'). 2. If still reverting, uninstall McAfee and switch to a different antivirus. 3. If still reverting, create a new Windows user profile.

Sourced from militarycac.com. Rewritten for clarity.

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