Windows Server 2016 Build 14393970 Enus April 2017 2021 -
Windows Server 2016, specifically Build 14393.970, represents a critical point in the operating system's early maintenance phase. This specific build, released in March 2017 via KB4016635 , solidified the "Anniversary Update" foundation for enterprise environments. Overview of Build 14393.970
Released on March 22, 2017, Build 14393.970 was a cumulative update designed to address various stability and security issues discovered after the initial launch of Windows Server 2016 in late 2016. It was distributed as part of the Long-Term Servicing Branch (LTSB), ensuring a stable platform for mission-critical workloads. Key technical aspects of this build included:
Release Media: Sourced from the SW_DVD9_Win_Svr_STD_Core_and_DataCtr_Core_2016_64Bit_English_-2_MLF_X21-22843 media, it supported both Standard and Datacenter editions.
Core Improvements: Addressed bugs in the servicing stack and provided pre-installed updates to streamline new installations.
System Features: Included native UEFI support and was one of the last major server releases to maintain some 32-bit counterpart packages for specific repair tasks. Windows Server release information | Microsoft Learn windows server 2016 build 14393970 enus april 2017 2021
Windows Server 2016 Build 14393.970 refers to a specific stable milestone reached through the March 22, 2017 cumulative update (KB4016635). This build is a part of the Windows Server 2016 (Version 1607) lifecycle, which serves as a critical foundation for modern hybrid-cloud environments. Build Overview and Core Specifications
This specific release (Build 14393.970) was a key update leading into the April 2017 patch cycle. It addressed critical security vulnerabilities and functional bugs that were discovered following the initial Release to Manufacturing (RTM) of Windows Server 2016 in late 2016. OS Version: Windows Server 2016 (Version 1607). Build Number: 14393.970. Release Date: March 22, 2017. Architecture: 64-bit (x64). Language: English (en-US). Key Features and Improvements
By April 2017, this build had matured to support intensive "Software-Defined Datacenter" (SDDC) initiatives. The primary enhancements in this version include:
Security Patches: Critical updates were delivered for the Windows Kernel, Internet Explorer, and the Scripting Engine to mitigate emerging threats. Windows Server 2016, specifically Build 14393
Networking Stability: Significant improvements were made to the Host Network Service (HNS), which is vital for container networking and software-defined networking stacks.
Identity & Access: Enhancements to Active Directory Federation Services (AD FS) allowed for smoother authentication across diverse directories.
Nano Server Support: Continued refinements for the Nano Server installation option, including better recovery console tools and image building modules. Lifecycle and Support Milestones
Windows Server 2016 follows a long-term servicing model. While this specific build was a stepping stone, the broader 1607 version has a defined lifespan: KB4016635 (OS Build 14393.970) Notable CVEs fixed in that build:
22 Mar 2017 — KB4016635 (OS Build 14393.970) - Microsoft Support. Microsoft Support Windows 10 and Windows Server 2016 update history
It is important to clarify at the outset: Windows Server 2016 build 14393.970 (not 14393970) is the correct version string for the April 2017 cumulative update for the Windows Server 2016 Long-Term Servicing Branch (LTSB). The number “2021” in your keyword likely refers to a later search date or a misconception—Microsoft did not release a build with that exact 8-digit sequence. This article will provide a comprehensive technical deep dive into the genuine KB4015217 (build 14393.970) from April 2017, its implications for enterprise environments, and why it remains relevant to administrators researching legacy builds for 2021 patching cycles.
Notable CVEs fixed in that build:
Beyond CVEs, Microsoft included:
Microsoft permitted direct upgrades from Server 2016 (any build ≥ 14393.0) to Server 2019 or 2022, provided:
Thus, April 2017 acted as a “minimum safe stepping stone” for long-term migration planning.