If you are installing a Smoothwall Filter and Firewall on Hyper-V device and during the install an error shows that the CPU does not support the 64-bit extensions required, please disable Processor Compatibility mode for the Smoothwall host.
To find this setting, see the knowledge base article from Microsoft, Processor Compatibility Mode in Hyper-V.
The Smoothwall Filter and Firewall host needs to be powered off to change this setting.