March 14, 2017—KB4012213 (Security-only update)

Applies to: Windows 8.1Windows Server 2012 R2

This update includes only security updates. Key changes include:

Security updates to Microsoft XML Core Services, SHA-1 deprecation for SSL/TLS certificates, Windows Media Player, Microsoft Graphics Component, Windows OS, Microsoft Windows PDF Library, Windows kernel-mode drivers, Microsoft Uniscribe, Windows kernel, Windows Hyper-V, Windows kernel, Windows SMB Server, Internet Information Services, and Active Directory Federation Services.

For a complete list of affected files, see KB4012213.