Windows 10 build 18327.1

10.0.18327.1.19h1_release.190125-1424
	Build of Windows 10 May 2019 Update
OS family	Windows 10 (NT 10.0)
Version number	10.0
Build number	18327
Build revision	1
Architecture	x86, x64, ARM32, ARM64
Build lab	19h1_release
Compiled on	2019-01-25
Expiration date
Timebomb	2019-07-05 (+161 days)
SKUs
	Home (N, Single Language, China); Pro (N, Single Language, China); Education (N); Pro Education (N); Pro for Workstations (N); Enterprise (N, (N) Evaluation, Multi-session); IoT Enterprise; Preinstallation Environment
About dialog

Windows 10 build 18327.1 is a build of the Windows 10 May 2019 Update. The Assessment and Deployment and the Software Development kits for this build were publicly released by Microsoft on 5 February 2019,^[1] although the full build was never officially distributed through the Windows Insider Program.

A screenshot of this build's Pro SKU in the English (United States) language was posted to the BetaWiki Discord server on 9 August 2021, but was removed shortly afterwards. The full build was then uploaded in the x64 Arabic (Saudi Arabia) variant on 4 July 2022, followed by its x64 English (United Kingdom) and x86 French (Canada) counterparts on 10 July 2022 and its ARM64 variants on 23 July 2022.

The complete Unified Update Platform source package set for its x86 compile (in all localizations) was uploaded to the Internet Archive on 29 July 2022.^[2]

This build is also obtainable by uninstalling the KB4487939 update from build 18327.7, the latter of which was accidentally uploaded to Windows Update servers on 24 September 2024.

New features and changes[edit | edit source]

Added support for controlling luminosity through the Acrylic effect brush in Universal Windows Platform applications.
Events generated by Trace Log macros will now always return zero for both the event ID and version information.
Various internal-facing changes to existing Windows application programming interfaces such as Windows.Graphics.DirectX and Windows.Devices.Enumeration.