We tested a well-known ultralight portable build (version 19045.5198 Pro) on three machines:
| Hardware | Stock Win10 22H2 | Ultralight Portable | |----------|----------------|----------------------| | Intel Atom Z3735F, 2GB RAM, eMMC | Boot: 3 min, RAM: 1.8GB | Boot: 40 sec, RAM: 520MB | | Core i5-6200U, 4GB RAM, SATA SSD | Boot: 25 sec, RAM: 1.2GB | Boot: 18 sec, RAM: 480MB | | Ryzen 5 5600X, 16GB RAM, NVMe | Boot: 12 sec, RAM: 1.1GB | Boot: 9 sec, RAM: 450MB | windows 10 22h2 190455198 pro ultralight portable
Disk footprint: 3.2GB (compact+LZX).
Processes at idle: 27 (vs. 110+ for stock Windows). Apply Windows To Go (WTG) feature using Rufus or dism
If you need a lightweight, portable Windows: Enable Compact OS and LZX compression to fit under 4GB
Old laptops with 2GB of RAM, Intel Atom CPUs, or eMMC storage struggle with standard Windows 10. This ultralight build can breathe new life into such machines, offering a responsive GUI where even opening the Start Menu previously took seconds.
Warning: Pre-made ISO files of modified Windows builds found on torrent sites or file uploaders often contain malware, backdoors, or cryptominers. The safest method is to create your own ultralight portable Windows using official Microsoft media and tools like NTLite, MSMG Toolkit, or WinReducer.