This is a "debloated" version of Windows 11 (22H2). FBConan is a well-known developer in the custom OS scene who specializes in stripping Windows down to its bare essentials. The goal is to reduce the OS footprint so it uses less RAM, fewer CPU cycles, and takes up minimal disk space.
Never install a custom OS on a drive containing data you haven't backed up elsewhere. Download Windows Ultralight (22621 590) FBConan zip
The installed size is often a fraction of the standard 20GB+ Windows installation. This is a "debloated" version of Windows 11 (22H2)
It’s common for these builds to idle at under 1GB of RAM. Never install a custom OS on a drive
While the idea of a "Windows Ultralight" build by FBConan sounds like a dream for anyone running an older laptop or a resource-heavy gaming rig, you should approach these custom ISOs with a mix of excitement and caution. What is Windows Ultralight (Build 22621.590)?
Often, Windows Defender and Windows Update are stripped or disabled. You are responsible for your own security.
Since this is a third-party modification, you are trusting the developer hasn't included anything malicious (or unintentionally broken a critical system component). Where to Find It