When combined, promises a sub-4GB footprint, under 500MB of RAM usage at idle, and the ability to boot on almost any x86-64 hardware directly from removable media.
However, Pro adds about 500MB of components. An ultralight Pro should still be under 6GB installed. windows 10 22h2 190455198 pro ultralight portable
Mainstream support for this version ends on October 14, 2025 . Update Highlights (Build 19045.5198) When combined, promises a sub-4GB footprint, under 500MB