To reset TLS security settings to their default in Windows: 1. Open Internet Options: Press Windows + R, type inetcpl.cpl, and press Enter. 2. Advanced Tab: Go to the Advanced tab. 3. Restore Advanced Settings: Click on the Restore advanced settings button to reset all settings to their default. 4. Security Section: Scroll down to the Security section. 5. Enable TLS 1.2 and TLS 1.3: Ensure TLS 1.2 and TLS 1.3 are checked, and uncheck SSL 2.0 and SSL 3.0 if they are enabled. 6. Apply and OK: Click Apply and then OK to save the changes.