How to Change Your Microsoft Office 2007 Product Installation or License Registration Key Code

It is sometimes necessary to change the product installation and registration key used by Microsoft Office 2007. This may be due to having installed the wrong key in the first place, the PC was imaged from another PC with the same product installation key, or you are installing a legally purchased license key on a PC where Microsoft Office was previously installed illegally using a pirated license code. The advantage to this procedure is that it allows you to quickly change the key without having to remove and reinstall your software.

Please note that installing Microsoft Office, or any software, using an illegally obtained license or installation code, or installing more copies than you are legally entitled to is punishable by law. This article is intended for use only in situations where you are enabling a legally obtained installation key.

The following procedure outlines how to edit the Microsoft Windows registry to remove the existing product key, which will then enable the new key to be activated online with Microsoft. Improper editing of the Windows registry can result in a variety of problems ranging from inoperable applications to a complete failure of Windows to boot. This article assumes that you are familiar with editing the registry. A qualified computer support technician should be consulted if this is not something that the reader is comfortable doing themselves.

  1. Start the registry editor.
  2. Browse to the following key: HKLMSOFTWAREMICROSOFTOFFICE12.0REGISTRATION.
  3. Export this key for use in the event that you have a problem and need to roll back to the pre-existing configuration.
  4. Within the Registration container, locate and delete the DigitalProductID and ProductID registry keys.

The next time you start any Microsoft Office application you will be prompted to register your activation key. Simply follow the prompts to complete registration. To check the status of your Microsoft Office product registration in Office 2007, click on the Office button in the upper left hand corner of Microsoft Word, go to Word Options, choose Resources, and then click on the “Activate” button in the section titled “Activate Microsoft Office”. This button will also allow you to manually register your software.

Depending on which flavor of Office you are registering, and which version, if any, is pre-installed on the PC, you may receive trial notices for unlicensed Office components when you launch Office. If this occurs, restart Microsoft Office the required number of times until the trial expires and you will no longer receive the annoying notice!

This procedure was tested using the Office 2007 Small Business Edition MPK version of Office that was pre-installed on a new PC. Although not tested, it should work on Windows XP and later versions of Microsoft Windows. It should work with all Microsoft Office 2007 editions, but may not work on prior versions.