May 9, 2017—KB4019213 (Security-only update)

May 9, 2017—KB4019213 Security-only update Applies To Windows 8.1 Windows Server 2012 R2 Improvements and fixes This security update includes quality improvements. No new operating system features are being introduced in this update. Key changes include: Updated Windows Cryptography API to...

April 11, 2017—KB4015547 (Security-only update)

April 11, 2017—KB4015547 Security-only update Applies To Windows 8.1 Windows Server 2012 R2 Improvements and fixes This security update resolves security vulnerabilities in Hyper-V, libjpeg image-process library, Win32K, Adobe Type Manager font driver, Active Directory Federation Services,...