Tools that can be used to monitor your Computers Security
TCPView is a portable tool that can be used to display a detailed list and current state of all TCP and UDP endpoint connections and the process name running each endpoint. TCPView provides more informative information than the Netstat program that ships with Windows and includes a command line version called Tcpvcon that offers the same functionality.
Google Hacks: Although you can type search filters or search strings right there in Google Search, "Google Hacks is a compilation of carefully crafted Google searches that expose novel functionality from Google's search and map services." It can be used to perform Advanced Google Searches for music, applications, tools, books, view a map or time line, and perform many other specific types of searches.
CurrPorts is a portable tool that can display a list of all open TCP/IP and UDP ports on a computer, allowing the user to monitor any remote activity that might be occurring. The tool offers information about the process that opened the port, the process name, path, when the process was created, and the user that created it.