Windows 10 Pro Rs4 V180317134191 Enus X64 July2018 V3 Prea 64 Bit [verified] Jun 2026

RS4 improved native support for media formats. It had better built-in support for FLAC audio and high-efficiency video coding (HEVC/H.265), which meant you often didn't need to install third-party codec packs (like K-Lite) as frequently.

: In the context of third-party ISO names, "PREA" typically means Pre-Activated , implying the OS will attempt to activate itself automatically during or after installation without requiring a manual key entry. RS4 improved native support for media formats

Windows 10 version 1803 (April 2018 Update) reached on November 12, 2019 for Home/Pro editions. This means: "PREA" typically means Pre-Activated

Have you encountered this or similar “preA” builds? Share your experience with our forensic team at [contact placeholder]. RS4 improved native support for media formats