When I do the installation in a new VM Windows 10 Pro offline, without any other installation (ArcMap or ArcGIS Pro) the installation is successful. When I try to do the same installation at a VM with ArcMap 10.8.1 or ArcGIS Pro 2.6, the installation blocked after 16%. No error is given.
For both installation, I install the Microsoft.NET.Native.Framework.2.2, Microsoft.NET.Native.Runtime.2.2 and Microsoft.VCLibs.x64.14.00.
Someone an advise?