Acronis True Image 9.1 Enterprise Server for Windows can be installed by default when you deploy the Plesk 8.1 installation package. To do this, select typical or full installation when installing Plesk 8.1.
In case the custom installation was selected and you did not installed Acronis True Image 9.1 Enterprise Server for Windows, you can install ATI using standard Windows Add or Remove Programs option:
Note. After installation of ATIS module the server should be restarted.
For more information on installation of Plesk 8.1 for Windows, refer to the Plesk 8.1 for Windows Installation Guide.