How can one check whether my Windows 7 supports TLS 1.2?

Windows 7 definitely supports TLS 1.2 . I have a Windows 7 Pro machine here and TLS 1.2 is enabled.

To Check:

Control Panel, Internet Options, Advanced.

Scroll down most of the way to the bottom for TLS and, most likely, all have been enabled. If not, enable, close out and restart.

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  1. Make sure the reg key HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.2\Client\Enabled is 1.

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  2. Make sure that the kb3140245 Windows update is installed:

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