There is in DISM or Windows Setup for a .cab file. However, the term -Extra appears in community scripts, automation wrappers (e.g., SCCM, MDT, or custom PowerShell), and older documentation as a placeholder for:
: While it remains an optional component, Microsoft has signaled a move toward decoupling .NET Framework 3.5 from standard Windows 11 setup processes starting in 2026, though it will likely remain available as an on-demand feature. Install .NET Framework 3.5 on Windows 10 - Microsoft Learn Microsoft-windows-netfx3-ondemand-package.cab -Extra
This guide covers everything from locating this file to fixing common installation errors like and 0x800F081F . Install .NET Framework 3.5 on Windows 10 - Microsoft Learn There is in DISM or Windows Setup for a
So why would someone exclude "Extra"?
