The optimization achieved in the custom Ultralight build drastically scales down the operating system footprint while maintaining core Windows 11 Pro functionality. Component / Metric Stock Windows 11 Pro (23H2) Custom Ultralight Build (22631.2428) ~1.6 GB Disk Space (Installed) ~20 GB to 30 GB ~3 GB to 4 GB Idle RAM Usage 2.5 GB – 3.5 GB 400 MB – 800 MB Background Processes 130+ Processes 30 – 45 Processes TPM 2.0 / Secure Boot Strictly Required Completely Bypassed CPU Requirements 8th Gen Intel / Zen+ AMD minimum Supports Older/Unsupported CPUs Core Features of the 23H2 Base Build (22631.2428)
Often includes a portable "toolbox" app that allows users to re-enable features (like the Windows Store or Windows Defender) if needed, rather than permanently stripping them. windows 11 pro 23h2 build 226312428 ultralight new
If you are planning on installing this, always test the ISO in a virtual machine first to ensure all your necessary hardware and applications function correctly. The optimization achieved in the custom Ultralight build
Fewer background processes running concurrently means the CPU can process peripheral commands from mice and keyboards faster. Microsoft recommends moving to version 25H2 (the Windows
As of November 11, 2025, . This means they no longer receive monthly security updates. Microsoft recommends moving to version 25H2 (the Windows 11 2025 Update) for continued security and innovation.
If you decide to install this operating system, follow this sequence: Backup all data to an external drive. Download the custom ISO from a vetted community thread.