To review:
Free download, minimal requirements, automatic rootkit detection, removal and cleanup, GUI interface, desktop virus-detection, Silent mode, file/process quarantine.
Built-in scanner, scanning progress window.
No configuration/options.

We examined BitDefender Internet Security, and we have to say we're impressed.
The Internet Security setup walks you through a technical setup wizard, and you can also access its admin settings by 50e0806aeb latrwhea