Views:

Customers who are still using legacy OS versions (Windows 7 SP1, Windows Embedded POSReady 7, and Windows Server 2008 R2 SP1) are required to have SHA-2 code signing support installed on their machines in order to successfully install or upgrade the Apex One Security Agent.

 
No customer action is required for Windows 8.x, Windows 10, Windows Server 2012 and above because the SHA-2 compatibility is already built-in.
Windows PlatformRequired Microsoft Security Update
Windows Server 2008 R2 SP1
Windows 7 SP1
Windows Embedded POSReady 7

Refer to 2019 SHA-2 Code Signing Support requirement for Windows and WSUS for more information.