https://support.microsoft.com/en-au/topic/security-only-update-for-net-framework-3-5-for-windows-8-1-and-windows-server-2012-r2-kb4532961-88d98c60-f581-f99f-d18f-249046f54b6a
Security Only Update for .NET Framework 3.5 for Windows 8.1 and Windows Server 2012 R2 (KB4532961)...
Security Only Update for .NET Framework 3.5 for Windows 8.1 and Windows Server 2012 R2 (KB4532961)