Visual Studio C++ Redistributable Requirement
ArcGIS Desktop requires Microsoft Visual C++ 2015-2019 Redistributable (x86) minimum version 14.22.27821. If the redistributable is not already installed, running setup.exe will install it before setup.msi is launched. To run setup.msi (without running setup.exe) the redistributable must already be installed.
.NET Support
ArcGIS Desktop requires Microsoft .NET Framework Version 4.5. If a minimum installation of .NET Framework 4.5 is not detected on your machine, the ArcGIS Desktop setup will not proceed.