Stop wasting time waiting for the online installer to fail.
Dism /online /enable-feature /featurename:NetFx3 /All /Source:D:\sources\sxs /LimitAccess Use code with caution. Copied to clipboard Alternative: Windows PowerShell net framework 3.5 offline install
The official "Offline Installer" from Microsoft (dotnetfx35.exe) is mostly a bootstrapper. It still needs the internet. We need the real source files. Stop wasting time waiting for the online installer to fail