There is a certain Windows update which must be installed on the Microsoft Windows 2012 R2 operating system that is required for Veeam Agent for Microsoft Windows functionality - KB2919355.
The update contains necessary Universal C Runtime components that are required for Veeam Agent for Microsoft Windows 18.104.22.16801.
If the update is not installed, software components will not function properly:
Service cannot be started. System.IO.FileNotFoundException: Could not load file or assembly 'CInterop.VeeamLicense.dll' or one of its dependencies. The specified module could not be found.
File name: 'CInterop.VeeamLicense.dll'