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 is available in all recent versions of Windows. WMI is installed with Windows Me, Windows 2000, Windows XP and Windows Server 2003. For Windows 98 and Windows NT 4.0, WMI is available as an Internet download from http://www.microsoft.com/downloads.