When installing or upgrading the Boring Server, the installer gets stuck on the installation of the .NET 6.0.11 prerequisite with the message:

One or more issues caused the setup to fail.  Please fix the issues and then retry setup. 

0x8007066 - Another version of this product is already installed.  Installation of this version cannot continue.  To configure or remove the existing version of this product, use Add/Remove Programs on the Control Panel.

Cause:

Milestone has confirmed this to be due to a corrupt installation of .NET 6.0.16, and we have found this to occur occasionally when the user recently upgraded to XProtect 2023R2. 

Fix:

The workaround we have found to work is reinstalling .NET 6.0.16. 

Uninstall and Re-install ASP.NET Core Runtime 6.0.16

• Verify that you are running .NET 6.016
• Stop all Milestone services on the management server. See the screenshot below.

• Download ASP.NET Core Runtime 6.0.16 Windows hosting bundle
• Run the ASP.NET Core Runtime 6.0.16 installer and choose "Uninstall".
• After the uninstall is complete, run the ASP.NET Core Runtime 6.0.16 installer again, but this time choose "Install".

Re-install Boring Server Complete

• Run the "Boring Server Complete" installer and complete the installation.
• Start all the Milestone services that were previously stopped.
• Verify you can login to Milestone starts as expected and you can login to the Milestone management client.
• Verify you can login to Boring Toolbox after installation is complete.