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The user needs an updated version of Windows 7 Service Pack 1 - #1519 solved their problem because upgrading installed a sufficiently up-to-date version. There isn¡¯t a way around installing either SP2 or a more modern version of SP1. Here is Microsoft's statement regarding adding support for SHA-256 signatures to legacy versions of Windows:

https://support.microsoft.com/en-us/help/4472027/2019-sha-2-code-signing-support-requirement-for-windows-and-wsus

Chinese version of the same page:

https://support.microsoft.com/zh-cn/help/4472027/2019-sha-2-code-signing-support-requirement-for-windows-and-wsus