Thanks for the information. Apparently one of the Microsoft Windows automatic updates resolved the issue. The installation ran for over an hour (and this is a fast desktop). When I tried to install the Net Frame 4.6.2 again, it replied that Net 4.6.2 was already installed on my computer. I next ran the update to my flight simulator (Lockheed-Martin P3D) which required Net 4.6.2 and it installed fine, so please close this issue.