Download key finder software: Product Key Informer
Product Key Informer is another free key finder software but it finds product keys for only Microsoft Office 2007, Office 2003, Office XP, Windows 7, Windows Vista, Windows XP, Windows 2000, Windows ME, and Windows 98.
Product Key Informer works in Windows 7, Windows Vista, Windows XP, Windows 2000, Windows ME, and Windows 98.