ProduKey is a small utility that displays the ProductID and the CD-Key of Microsoft Office (Microsoft Office 2003, Microsoft Office 2007), Windows (Including Windows 7 and Windows Vista), 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.
ProduKey doesn’t requite any installation process or additional DLLs. In order to start using it, simply extract the files to any folder you like, and then run the executable file – produkey.exe
If you want, you can also download ProduKey with full install/uninstall support (produkey_setup.exe), and then install it like any other software.
The main window of ProduKey displays the list of Windows, Office, and SQL Server products installed on your system. For each product, the “Product ID” and “Product Key” are displayed. If you want the view the product key information in another computer, or in another operating system within the same computer, use the command-line options below.
You can download produkey from here