Support for Windows 2000 (SP4) in Acronis Backup (Advanced) 11.7 is limited.
Acronis Backup (Advanced) 11.7 components cannot be installed on Windows 2000 (SP4). To back up a Windows 2000 (SP4) machine, you need to install Acronis Backup (Advanced) 11.5 Agent for Windows on it. Installation package is available on Acronis website: My account section -> My products and downloads -> Acronis Backup (Advanced) 11.7 -> Download older builds and read version history.