Basically this is an antivirus that runs on the background and monitors all the URLs sent and received in Skype chats. When it detects some malicious URL, it sends an alert to the chat not to click the link. User can configure web threat protection strength and whether it pops up separate warning window. In addition to the client, there is also a webpage http://reclassify.wrs.trendmicro.com where user can enter URL and get feedback about that.