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.
The WMI Diagnosis Utility -- Version 2.2. A utility to help system administrators diagnose and repair problems with the WMI service. WMIDiag.vbs is a VBScript script designed to help you ascertain the current state of the WMI service on a computer.