While a build exactly numbered "22621.105" is older, FBConan's projects are frequently hosted on the and the official Windows X-Lite website. Official Download & Resources

: You can browse and download various legacy ISOs directly from FBConan's Internet Archive profile , which includes builds like 22621.590 and others from the 22621 series. Key Features of Phoenix LiteOS (22621 Series)

: Designed to run as light as possible while maintaining core functionality and support for standard drivers.

The (specifically the 22621 build family) is a modified, "debloated" version of Windows 11 designed by developer FBConan to improve performance and responsiveness for gaming and low-end hardware.

To find the specific build or the most current "Ultralight" and "Ultimate" versions, you can use the following verified sources:

: Removes telemetry, unnecessary pre-installed apps, and background processes to reduce system resource usage.