I just added tags to this post to increase visibility.
What revision of MassHunter Acquisition software are you attempting to install?
Just an update.
Agilent sent me the B.08.02 version of the software which is the most up to date version. On running the new version I came across the same error. I overcame the problem by installing .net 3.5 from within Windows 10 as one of the optional features you can add.
Everything went okay after that. Problem solved