Windows 7 and Windows Server 2008 R2 does not include the SHA-2 signing and verification functionality in these operating systems. You need to use the Microsoft Update service for all supported editions of Windows 7 and Windows Server 2008 R2 to add support for SHA-2 signing and verification functionality. You can download the update from the following link.

https://docs.microsoft.com/en-us/security-updates/securityadvisories/2015/3033929#availability-of-sha-2-code-signing-support-for-windows-7-and-windows-server-2008-r2