Reset your Office 2007 Product Key
If you juggle multiple license for your Office 2007 products eventually, you are going to install on the same machine twice. You will only know this off course after it is fully installed. At that point, you have two choices pretend you did not know, Microsoft will flag, and shutdown updates after thirty days. You can uninstall the whole product and reinstall again. There is a third option that is easy and less painful then the other two.
There is a registry hack:
Start
Run
Regedit
Find this key:
HKEY_LOCAL_MACHINE\
HKEY_LOCAL_MACHINE\SOFTWARE\
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Office\
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Office\12.0\
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Office\12.0
\Registration\
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Office\12.0
\Registration\{90120000-0030-0000-0000-0000000FF1CE}
This may not be an exact match. Find the ProductName of Microsoft Office 2007
When you have found this registry key, there are two values to delete from the registry
ProductID
DigitalProductID
Exit the registry editor
Open any of the Office Applications like word or excel, and you will be prompted for the new serial number.