In order to start using it, simply extract the files to any folder you like, and then run the executable file - produkey.exe. ProduKey doesn't require any installation process or additional DLLs. 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 view this information for your current running operating system, or for another operating system/computer - by using command-line options. If you are looking for an alternative, we recommend you to download Recover Keys. This could be due to the program being discontinued, having a security issue or for other reasons. ⚠ Note: This software is no longer available for the download. I did it several time accross the years without trouble.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 10/8/7/Vista), Exchange Server, and SQL Server installed on your computer.

Your new hardware signature is now associated to you licence. Once done, you can come back to offline account. (this process can be launched from your computer in the license activation page or from MS website) Once the new computer is installed, associate again your computer windows account with your microsoft account, go to the microsoft website, migrate your key from the previous computer to the new one. Or format, the key is not longer a number but a computer signature associated to your microsoft account. Once the license visible in you microsoft account, you can revert and go back to offline account. Just associate your windows computer account with your microsoft account. Make sure your previous licence is associated to your microsoft account so you will not loose the licence. Usually the change of motherboard trigger this reactivation. Note: previous computer=computer with too many hardware change to produce a signature recognized by MS and so who can't be reactivated automatically.

If not, you will have the possibilty to transfert your key from your previous computer to your new computer. If your license is an OEM, yes you will have to repay.

Nirsoft product key