Dism /online /enable-feature /featurename:NetFx3 /All /Source:D:\sources\sxs /LimitAccess Use code with caution. Copied to clipboard /Source:D:\sources\sxs : Directs Windows to the local files on your media. /LimitAccess
dism /mount-wim /wimfile:install.wim /index:1 /mountdir:mount dism /image:mount /add-package /packagepath: "C:\DotNet35\cabfile.cab" dism /unmount-wim /mountdir:mount /commit net framework 3.5 sp1 offline installer
To install completely offline on Windows 10/11: net framework 3.5 sp1 offline installer
: Improved interoperability and debugging for web services. Common Troubleshooting Microsoft .NET Framework 3.5 Service pack 1 (Full Package) net framework 3.5 sp1 offline installer