Windows 10 version 1803 has reached its end of service for Home and Pro editions. Users are encouraged to update to the final version, , to continue receiving monthly security updates through October 14, 2025 clean installation KB4340917 (OS Build 17134.191) Jul 24, 2561 BE —

Replacing the older "Quiet Hours" mechanism, gave users automated control over distracting notifications. It could automatically trigger during fullscreen gaming, presentation mirroring, or designated work hours. Microsoft Edge Improvements

: Mitigating a security flaw in how CPUs managed floating-point registers across different execution contexts. Core Operating System Stability

Today, this specific build is primarily used in testing environments, virtual machines, or legacy hardware deployments. It represents a snapshot of a time when Microsoft was heavily leaning into cloud synchronization features, experimenting with their custom browser engines, and standardizing bi-annual feature updates.

This major update introduced several productivity and interface enhancements:

: Shorthand for Pre-Activated . This signifies that the distribution has been altered using a bypass tool to trick the software into validating its license state without requiring a retail product key. Core Architectural Features of Build 17134.191

Since this is the "April 2018 Update," it introduced several features that were considered major upgrades at the time. If you are using this for a specific purpose (like running older software or a low-end PC), these are the highlights:

The file "windows 10 pro rs4 v180317134191 enus x64 july2018 v3 prea 64 bit" is an of Windows 10 Pro intended to allow users to use the OS without purchasing a license. While it contains the legitimate features of the April 2018 Update (patched to July 2018), it carries the inherent risks of using modified software and is currently an obsolete and unsupported version of Windows.

It is important to note that this specific version is .

: The exact compilation build number. While 17134 represents the base structure of the April 2018 Update, the .191 sub-version pinpoints the precise cumulative update level applied to the system image.

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