Vmon is a program that defends you against such risks that you face inspite of having anti-virus application installed on your system. You might have ended up with infected system on inserting disk or USB though you have an anti-virus software running on the machine. This tool runs in support of your standard anti-virus program and protects your system by checking inserted disks and drives and disabling auto-runs. It forces your anti-virus software to scan the disks inserted. It also monitors your system files continuously and issues a warning when serious changes occur in your system. It even monitors your registry and keeps logs of the changes occurring.