IWSVA checks the program directory and uses the latest pattern file and engine library file to scan inbound/outbound traffic. It can distinguish the latest pattern file by its file extension. For example, lpt$vpn.401 is newer than lpt$vpn.400.
Occasionally, a new pattern file might incorrectly detect a non-infected file as a virus infection (also known as a false positive). You can revert to the previous pattern file or engine library file.
To roll back to a previous pattern file or scan engine:
- Click Updates > Manual on the IWSVA main menu.
- Select the component to roll back and click Rollback.
A progress bar indicates the rollback progress, and a message screen then displays the outcome of the rollback. After the rollback, you can find the current version and date of the last update on the System Dashboard tab of the Summary screen.