Given that it's free, I can overlook the fact that both its on-demand scan and real-time protection proved sluggish in testing.
The app's main window is largely white, with a white-on-slate menu at left and couple of panels that offer status information and access to features.
For Clam AV to work properly, both the Clam AV engine and the Clam AV Virus Database (CVD) must be kept up to date.
Freshclam should perform these updates automatically. Instructions for setting up Freshclam can be found in the Clam AV Manual or in the documentation section.
Following extensive testing of clamav and the packages that use it in the backports repository, they may be updated to a newer version.
Every computer that connects to the Luther network must have an accepted anti-virus software.
Sophos is supported on Luther's network and is available for Mac or PC.
Web Protection, Mail Protection, and Game Mode are grayed out and disabled, because they're not available in the free edition.
And the firewall item just helps you configure Windows firewall.