Windows 10 dotNET 3.5 Install Fix for Domain PCs
Open RegEdit and navigate to the HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate\AU folder. DoubleClick on UseWUServer(UseWindowsUpdateServer) and change the value to 0. Restart the Windows Update service. Now open the appwiz.cpl and add the dotNET 3.5 feature using Microsoft Update as source.