Mount your Windows 10/11 ISO and navigate to the \sources\sxs folder.
This is the official Microsoft recommended method. It does not require you to hunt for individual file downloads on the web. cab file for .net framework 3.5
Instead of copying the CAB to every machine, create a network share: Mount your Windows 10/11 ISO and navigate to
Microsoft does not provide a direct public download link for the individual .cab file to prevent version mismatches. Instead, you can find it in the following locations: cab file for .net framework 3.5