Change Office 2007 serial Key

How to Change your Office 2007 Product Key:

1.Click Start -> Run
2.Type regedit in the box and click OK
3.Navigate to the following path:
HKEY_LOCAL_MACHINE \Software\Microsoft\Office\12.0\Registration

Within Registration, there is subkey that may resemble the following:

{30120000-0011-0000-0000-0000000FF1CE}

4.Under Registration, you might find several subkeys that contain a combination of alphanumeric characters. Each key is specific to a program installed on your computer.
Open each subkey to view and identify the Office product version by the ProductName registry entry in the right pane. For example:
ProductName=Microsoft Office Professional Plus 2007

5.Once you have located the subkey that contains the Office product you wish to change the license key for, delete the following registry entries by right clicking on the registry entry in the subkey, click Delete, and select Yes:
DigitalProductID
ProductID

6.Close regedit
7.Start Microsoft Word, Excel, Outlook or another Office application. Office 2007 should now prompt you to enter a new 25 character product key
8.Enter a valid product key, and click OK
9.If prompted to choose your preferred type of Microsoft Office 2007 installation, select Install Now
10.Microsoft Office 2007 should now be updated with your new CD key