ProduKey is a System Utilities::System Maintenance software developed by NirSoft Freeware. After our trial and test, the software was found to be official, secure and free. Here is the official description for ProduKey: ProduKey is a small utility that displays the ProductID and the CD-Key of MS-Office, Windows, 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. you can download ProduKey 1.91 free now.