https://developercommunity.visualstudio.com/content/problem/461891/install-error-2017-microsoftvisualstudiominshellms.html
Sounds like a permissions issue. This would be especially true if the files are blocked as unsafe by Windows. Check the permissions on the file(s), ensure the files are not blocked by Windows Explorer.
The correct location to report issues with VS is via Visual Studio's
developer community site. They don't provide VS support on the MSDN Forums anymore, generally.
Michael Taylor http://www.michaeltaylorp3.net