ThreatMon overwhelm the limitation of PC firewall and anti-virus software. The limitation of PC firewall and anti-virus software is they can only to provide protection after knowing how the attack works. So your experience with firewall and anti-virus software, are more like to disable open network port, blocking certain IP addresses, and updating the virus definition files to scan the new existing virus. That is kind of passive detection and protection of your security. Your computer system might has been attacked when you take the above action to prevent them.