Microsoft’s official release notes for this build highlighted several enterprise-focused fixes:
For system administrators in 2017, applying build 14393.3970 was not optional; it was a recommended prerequisite for maintaining secure, stable datacenters.
You also mentioned 2021. This could mean:
By 2021, Windows Server 2016 (LTSC 1607) had:
So April 2017 build (14393.970) was already very outdated by 2021 standards.
In 2021, Windows Server 2016 mainstream support ended on January 11, 2022 (extended support runs to January 2027). However, many air-gapped or compliance-bound servers (finance, healthcare, defense) were still on builds from 2017–2018.
Introduction
Windows Server 2016 is a server operating system developed by Microsoft as part of the Windows NT family of operating systems. It was released on October 12, 2016, and has since undergone several updates and builds. This essay will focus on Build 14393.970 (en-US) of Windows Server 2016, which was released in April 2017. We will examine the key features, security enhancements, and support lifecycle of this build, as well as its relevance in 2021.
Key Features of Build 14393.970
Build 14393.970 of Windows Server 2016 was a cumulative update released on April 11, 2017. This update included various security enhancements, bug fixes, and performance improvements. Some of the key features of this build include:
Security Enhancements
Security was a major focus area for Windows Server 2016, and Build 14393.970 was no exception. This build included several security enhancements, including:
Support Lifecycle
The support lifecycle for Windows Server 2016 Build 14393.970 is an important consideration for organizations that rely on this build. Microsoft provides mainstream support for Windows Server 2016 for five years from the general availability date, which was October 12, 2016. Extended support is available for an additional five years. Therefore, support for Build 14393.970 (en-US) ended on January 11, 2022, after which only security updates were provided.
Relevance in 2021
Although Build 14393.970 (en-US) of Windows Server 2016 is no longer fully supported in 2021, it remains a widely used build in many organizations. Many organizations have been slow to migrate to newer versions of Windows Server, and as a result, this build remains in use.
However, running an older build like 14393.970 (en-US) can pose security risks, as newer security threats and vulnerabilities may not be addressed. Organizations still running this build are encouraged to upgrade to a more recent version of Windows Server, such as Windows Server 2019 or Windows Server 2022, to ensure they receive the latest security updates and support.
Conclusion
Windows Server 2016 Build 14393.970 (en-US) was a significant update released in April 2017. This build included various security enhancements, bug fixes, and performance improvements. Although it is no longer fully supported in 2021, it remains a widely used build in many organizations. Organizations still running this build are encouraged to upgrade to a more recent version of Windows Server to ensure they receive the latest security updates and support.
This guide covers Windows Server 2016 Build 14393.970 , a specific maintenance release from March 22, 2017 , delivered via
. This build is often found in older integrated ISO images (marked "April 2017") used for deployments during the 2017–2021 period. Microsoft Support Build Overview Release Date: March 22, 2017. Update ID: Windows Server 2016 (Version 1607). Support Status: Mainstream support ended January 11, 2022; Extended support continues until January 12, 2027 Microsoft Support Key Features and Fixes (Build 14393.970) Reliability Improvements:
Addressed issues with Hyper-V, active directory, and the kernel. Network Fixes:
Resolved issues where the DHCP server might lose its lease database. Storage Improvements:
Fixed a bug where Storage Spaces Direct (S2D) might stop responding. Security Updates:
Included patches for Microsoft Edge, Internet Explorer, and Windows Kernel-mode drivers. Microsoft Support Deployment Requirements Processor: 1.4 GHz 64-bit with support for NX, DEP, and LAHF/SAHF. for Server Core. for Server with Desktop Experience.
Note: Allocating at least 800 MB is recommended for stable installation in virtual environments Disk Space: Minimum 32 GB. Post-Deployment Recommendations
Since this build is from 2017, it lacks critical security updates released after that date. Microsoft Update Catalog
Windows Server 2016 Build 14393.970 refers to the operating system version associated with , which was released on March 22, 2017
. This specific build did not introduce new operating system features but focused on quality improvements and bug fixes, such as resolving issues with the Windows Store and CRM 2011 on Internet Explorer 11. Microsoft Support
If you are looking to "create" or enable a feature within this environment, you typically use the Server Manager PowerShell How to Enable a Feature in Windows Server 2016 To activate roles and features on this build: Open Server Manager : Run as Administrator. Add Roles and Features Add Roles and Features Wizard Steps
: Follow the prompts to select your server and check the specific feature you wish to install (e.g., .NET Framework 3.5 Containers and restart if required. Core Features of Windows Server 2016 (Build 14393) This build belongs to the Long-Term Servicing Channel (LTSC)
version 1607. Key features available for activation include: Microsoft Learn Compute & Virtualization : Hyper-V support for Nano Server , hot add/remove for memory/NICs, and Windows Server Containers Storage Spaces Direct (S2D) Storage Replica for disaster recovery. Shielded Virtual Machines (using BitLocker encryption), Host Guardian Service Just Enough Administration (JEA) Management
: PowerShell Desired State Configuration (DSC) and Windows Management Framework 5.0. Context for 2021 and Beyond
Windows Server 2016 Build 14393.970 (ENU) - April 2017 Update: A Detailed Review
In April 2017, Microsoft released an update for Windows Server 2016, bringing the build number to 14393.970 (ENU). This update was part of the ongoing effort to improve the stability, security, and performance of the Windows Server 2016 operating system. In this blog post, we will take a closer look at the details of this update, its significance, and what it means for Windows Server 2016 users. windows server 2016 build 14393970 enus april 2017 2021
What is Windows Server 2016 Build 14393.970 (ENU)?
Windows Server 2016 Build 14393.970 (ENU) is a cumulative update that was released on April 11, 2017. The update is also known as KB4015217 and is applicable to Windows Server 2016 systems with the English (United States) language pack installed.
Key Features and Fixes
The April 2017 update for Windows Server 2016 includes several key features and fixes, including:
Notable Fixes and Changes
Some notable fixes and changes in the April 2017 update for Windows Server 2016 include:
How to Install the Update
To install the April 2017 update for Windows Server 2016, follow these steps:
Conclusion
The April 2017 update for Windows Server 2016 (build 14393.970 ENU) is an important cumulative update that includes security patches, performance improvements, and stability and reliability fixes. Windows Server 2016 users should install this update as soon as possible to ensure their systems are up-to-date and protected against known vulnerabilities.
Update History
Here is a brief summary of the updates for Windows Server 2016:
By installing the latest updates, Windows Server 2016 users can ensure their systems remain secure, stable, and performant.
Windows Server 2016 Build 14393.970 is a specific cumulative update state released in April 2017 . It is part of the Windows Server 2016 (version 1607) lifecycle, which is based on the Windows 10 Anniversary Update core . 🛠️ Build Details & Identification
The build 14393.970 corresponds specifically to the installation of KB4015217, released on Patch Tuesday, April 11, 2017 . OS Version: Windows Server 2016 (Version 1607) Build Number: 10.0.14393.970 Architecture: 64-bit (x64) Release Date: April 11, 2017 Major Integrated Update: KB4015217 ✨ Key Improvements in this Build
This April 2017 update focused heavily on stability, security, and networking refinements :
Container Support: Improved the Host Network Service (HNS) to better support overlay network drivers for Docker Swarm Mode . For system administrators in 2017, applying build 14393
Hyper-V Stability: Addressed a critical issue where virtual machines would fail during high I/O (Input/Output) scenarios .
CredentialGuard: Fixed a bug causing unexpected account lockouts on domain-joined computers using Kerberos authentication .
Reliability: Improved Load Balancing and Failover (LBFO) during device failures or resource rebalancing .
Security Patches: Included critical security updates for the Windows Kernel, Microsoft Edge, Internet Explorer, and the .NET Framework . 📋 System Requirements
To run this build effectively, your hardware must meet these minimum Microsoft guidelines :
Processor: 1.4 GHz 64-bit with support for NX, DEP, and LAHF/SAHF . RAM: 512 MB for Server Core . 2 GB for Server with Desktop Experience (GUI) .
Disk Space: Minimum 32 GB (additional space required for GUI and RAM paging) . Network: Gigabit (10/100/1000baseT) Ethernet adapter . ⚠️ Important Lifecycle Note (2021 context)
While this specific build was a milestone in 2017, by 2021, Windows Server 2016 had moved into Extended Support . Mainstream Support End: Ended on January 11, 2022.
Extended Support End: Scheduled to end on January 12, 2027 .
Upgrade Path: For modern security and features, systems can be upgraded directly to Windows Server 2019 or Windows Server 2022 . Plan Your Windows Server Upgrade Path | Microsoft Learn
Windows Server 2016 Build 14393.970 refers to a specific cumulative update for the Version 1607 operating system, released on March 22, 2017 Microsoft Support Release Context The build was delivered via the March 22, 2017 update KB4016635 . It preceded the April 11, 2017 update KB4015217 , which bumped the version to build 14393.1066 . These updates were critical for improving the Host Network Service (HNS)
to support overlay network drivers used in Docker Engine for Windows Server 2016 containers. Microsoft Support Key Details & Lifecycle Operating System : Windows Server 2016 (Standard and Datacenter editions). Architecture : x64 (64-bit). English Language (en-US)
: The specific locale indicated in your request typically refers to ISO media that includes this build pre-installed for English-speaking markets. Support Dates : Mainstream support for Windows Server 2016 ended on January 11, 2022 Extended Support
: The OS is currently in its extended support phase, which is scheduled to last until January 12, 2027 Microsoft Support Update Progression (2017-2021) KB4016635 (OS Build 14393.970) KB4016635 (OS Build 14393.970) - Microsoft Support. Microsoft Support Update for Windows 10, version 1607 and Windows Server 2016
Update for Windows 10, version 1607 and Windows Server 2016: April 25, 2019. Microsoft Support
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.
While stable, the April 2017 CU introduced three documented regressions: By 2021 , Windows Server 2016 (LTSC 1607) had:
Microsoft later issued out-of-band hotfixes, but no official re-release occurred.