ProduKey 可以幫你查詢出你電腦上所安裝 Microsoft 的產品序號，可查詢的軟體保含有:MS-Office, Windows, Exchange Server, and SQL Server，如此你便不會常常忘記了你原有的軟體序號，可供你將資料備份下來，方便下次安裝時使用。
ProduKey is a small utility that displays the ProductID and the CD-Key of MS-Office, Windows, Exchange Server, and SQL Server installed on your computer. You can view this information for your current running operating system, or for another operating system/computer - by using command-line options. This utility can be useful if you lost the product key of your Windows/Office, and you want to reinstall it on your computer.