You can view the virus detection history.
Select [Security] - [Virus scan settings] - [Risk log] in administrator mode of Web Connection (or in [Utility] - [Administrator] of this machine), and confirm the history.
You can view the execution histories as the regular scan and manual scan results.
Select [Security] - [Virus scan settings] - [Scan log] in administrator mode of Web Connection (or in [Utility] - [Administrator] of this machine), and confirm the virus scan execution history.