Network port. Acronis Backup & Recovery 11 uses TCP port 9876 for local installation and for communication between components. The setup program automatically opens this port through Windows Firewall. If you use a different firewall, make sure that the port is open for both incoming and outgoing requests through that firewall.
Encryption software. If you are planning to use disk-level encryption software, such as PGP Whole Disk Encryption, make sure to install such software before installing Acronis Backup & Recovery 11.