produkey可以帮你查询出你计算机上所安装microsoft 的产品序号，可查询的软件保含有:ms-office, windows, exchange server, and sql server，如此你便不会常常忘记了你原有的软件序号，可供你将资料备份下来，方便下次安装时使用。

ProduKey 支持找回序列号的软件列表：
Microsoft Windows 98/ME
Microsoft Windows 2000
Microsoft Windows NT
Microsoft Windows XP
Microsoft Windows Vista
Microsoft Windows Server 2003
Microsoft Windows 7 (Doesn't work with Microsoft Volume Licensing)
Microsoft Windows 8 (Doesn't work with Microsoft Volume Licensing)
Microsoft Office 2000 (Only ProductID is displayed)
Microsoft Office 2003
Microsoft Office 2007
Microsoft Office 2010
Microsoft SQL Server 2000
Microsoft SQL Server 2005
Microsoft Exchange Server 2000
Microsoft Exchange Server 2003
Visual Studio