I have exactly same problem.Hi Vanir :)
My name is Aura and I'll be assisting you with your issue. On Windows 10, you don't need to install .NET Framework 3.5. You can enable it directly from the Control Panel, under Programs and Features and "Turn Windows Features On or Off". In the list, you should see .NET Framework 3.5. Can you check if the box is checked, and if not, do it and see if it can be applied? If it doesn't work from there, what error code are you getting?
Trigger is Sony DVD Architect 5.0 which need .NET 3.5
Same as Vanir I tried all ways. (including what Aura suggested which I believe Vanir did too from what I can read in his post).
Always getting error code
0x80070002
I also tried manual way.
Is there any way how to fix it?