The ISO retains the core kernel, DirectX, Visual C++ Redistributables (pre-injected), .NET Framework 3.5 & 4.8, Networking stacks (TCP/IP, WiFi), and SMB support. It runs like an appliance, not an operating system.
This is the specific Build Number and Update Build Revision (UBR). Windows 10 Ultralight v3 -21H2.19044.3803-.iso
Recommended spec for daily use:
The official Microsoft requirements for Windows 10 are 2GB RAM, 64GB storage, and a 1GHz CPU. The laughs at these numbers. The ISO retains the core kernel, DirectX, Visual