When installing Configuration Manager v6.20.0102 on Windows 10 and error message is received during installation of .NET Framework v4.7.2 that states:
The .NET Framework 4.7.2 is not supported on this operating system.
Windows 10 requires frequent updates that must be installed to keep the system compatible with new software installations. Windows 10 periodically releases a features update package that provides new features and compatibility. These are required for version of .NET framework installation.
Windows 10 release Information
Feature updates for Windows 10 are released twice a year, around March and September, via the Semi-Annual Channel and will be serviced with monthly quality updates for 18 months from the date of the release.
We recommend that you begin deployment of each Semi-Annual Channel release immediately as a targeted deployment to devices selected for early adoption and ramp up to full deployment at your discretion. This will enable you to gain access to new features, experiences, and integrated security as soon as possible.
Above except from Microsoft's Windows 10 Release information document: https://docs.microsoft.com/en-us/windows/release-information/
Option 1 - This option will require an active internet connection.
Using the windows search function (Windows key+S), search for "Windows Update Setting"
Click "Check for Updates"
Install all available updates
Option 2 - This option will not require an internet connection. It will require multiple steps be performed per the Microsoft websites guidelines to create and burn a windows update DVD using a downloadable .ISO file provided directly from Microsoft.
You can find these instructions and links on Microsoft's website here: https://www.microsoft.com/en-au/software-download/windows10