Error: Failed to verify [C:\windows\Veeam\Backup\Upload\VeeamDeploymentDll.dll] signature.

Challenge When Veeam Backup & Replication is attempting to install Veeam Agent for Microsoft Windows backup agents on a machine the procedure fails with: Unable to install backup agent: failed to connect to Error: Failed to verify C:\windows\Veeam\Backup\Upload\VeeamDeploymentDll.dll signature...