Hi @Mike Kerr ,
These errors may show nothing, it is not the specific error.
May we know how the install command is written, please let we know.
If the command use the usual dotnetfx40_full.exe /q /norestart, please substitute the /q (quiet) with /passive.
For example, dotnetfx40_full.exe /passive/norestart
Here is the related article we could refer to:
https://vhorizon.co.uk/installing-dotnet-framework-4-with-mdt/
Note: Non-Microsoft link, just for the reference.
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