2017 2021 | Windows Server 2016 Build 14393970 Enus April

As this is a cumulative update from April 2021, the main feature set revolves around patching vulnerabilities present in the OS up to that point.

In April 2017, Microsoft released KB4015217, which updated Windows Server 2016 from the RTM build (14393.953) to 14393.970. This was a standard monthly quality update focused on reliability and security fixes.

| Aspect | Verdict | |--------|---------| | Build 14393.970 (April 2017) | ✅ Historical reference only | | Using it in production (2025) | ❌ Extremely high risk | | Using it in an offline lab | ⚠️ Possible, but update immediately | | The “2021” label | Likely a repack date – check file hashes |

Bottom line: Unless you are researching a legacy bug from 2017, skip this build. Download a current, patched Server 2016 ISO instead.

Have an old ISO you need help identifying? Leave the file name in the comments. windows server 2016 build 14393970 enus april 2017 2021

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: As this is a cumulative update from April

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 Have an old ISO you need help identifying

Windows Server 2016 was released to manufacturing (RTM) on September 26, 2016, with build 14393.0. The versioning follows the pattern:
14393 = core RTM branch, .970 = cumulative update revision.

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.