Release Notes
April 2017 Security Updates
Release Date: April 11, 2017The April security release consists of security updates for the following software:
- Internet Explorer
- Microsoft Edge
- Microsoft Windows
- Microsoft Office and Microsoft Office Services and Web Apps
- Visual Studio for Mac
- .NET Framework
- Silverlight
- Adobe Flash Player
- Beginning with the October 2016 release, Microsoft is changing the update servicing model for Windows 7, Windows Server 2008 R2, Windows 8.1, Windows Server 2012, and Windows Server 2012 R2. For more information, please see this Microsoft Technet article, Further simplifying servicing models forWindows 7 and Windows 8.1.
- Windows 10 updates are cumulative. The monthly security release includes all security fixes for vulnerabilities that affect Windows 10, in addition to non-security updates. The updates are available via the Microsoft Update Catalog.
- Starting in March 2017, there will be a Windows 10 1607 delta package that contains just the delta changes between the previous month and the current release.
- Updates for Windows RT 8.1 and Microsoft Office RT software are only available via Windows Update.
- In addition to security changes for the vulnerabilities, updates include defense-in-depth updates to help improve security-related features
