Hola "cosmo14",
* Realiza
1 - Remueve:
%ProgramData%\Microsoft\VisualStudio\Packages
%ProgramData%\Microsoft\VisualStudio\Setup
%ProgramFiles(x86)%\Microsoft Visual Studio\"folderx"
C:\Windows\Temp
2 - Rename:
C:\windows\system32\WBEM\Repository
Restart
3 - Command Prompt (Adm):
net stop winmgmt
winmgmt /resetRepository
Restart
* Instalación offline
Create an offline installation of Visual Studio
https://docs.microsoft.com/es-es/visualstudio/install/create-an-offline-installation-of-visual-studio?view=vs-2019
* Activa log
Microsoft Visual Studio and .NET Framework Log Collection Tool
https://www.microsoft.com/en-us/download/details.aspx?id=12493
Command Prompt (Adm): collect
Busca en temp "vslogs.zip", ej: C:\Users\ignaba\AppData\Local\Temp\vslogs.zip
* Reportar un problema
How to report a problem with Visual Studio or Visual Studio Installer
https://docs.microsoft.com/en-us/visualstudio/ide/how-to-report-a-problem-with-visual-studio?view=vs-2019
* Caso similiar
Possible issues with the Visual Studio 2008 bootstrapper and how to work around them
https://blogs.msdn.microsoft.com/astebner/2009/02/20/possible-issues-with-the-visual-studio-2008-bootstrapper-and-how-to-work-around-them/
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Saludos.
[Ignacio Barrios] MPN-MCT: 2019, MCTS: Windows Server 2008 R2, MCSA-MCSE: Window Server 2012 R2, Server Virtualization with Windows Server Hyper-V System Center & MCSA-MCSE: Windows Server 2016
