What you really want to watch out for even more so than color change, is meat or poultry that has a bad odor or is sticky, tacky, or slimy to the touch. Let your other senses be your guide in these instances. Read more: The Color of Meat and Poultry - USDA.
Windows Management Instrumentation(WMI) is a set of extensions to the Windows Driver Model that provides an operating system interface through which instrumented components can provide information and notification.
WMI runs as part of a shared service host with ports assigned through DCOM by default. Starting with Windows Vista and Windows Server 2008, you can set up the WMI service to run as the only process in a separate host and specify a fixed port.