How to find this setting:
Main Console > Settings > Internet & Email Controls > Network
Not all versions of Trend Micro security software include this feature.
To help keep yourself safe on the Internet at home or on the go, you should mark both of these checkboxes.
Select Activate the Firewall Booster to enhance the protection given by the Windows Firewall... to configure the Windows Firewall so that it can offer better protection against online threats.
Select Display a warning when connected to potentially unsafe wireless networks or hotspots to see a warning if you connect to a wireless network without trustworthy security credentials.
Only password-protected wireless networks are considered safe. Wireless networks that redirect your connection without encryption are considered risky. Wireless networks that do not have an authentication process or a valid security certificate rank as dangerous.