How to change product key Office XP, Office 2003, Office 2007

Many times you might want to change the product key of Office suite installed in your system. It might be because your product key expired and you got a new one or it might be because you installed Office using pirated key and now you want to change the product key with a genuine one.

To change the product key you’ll have to uninstall the Office suite from your system and then reinstall it.

But here is a small and simple tutorial which will help you in changing the product key without uninstalling the Office.

Change Office XP Product Key:

1. Open regedit and go to: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Office\10.0\Registration
2. Under "Registration" key, you’ll see one or more GUID (Globally Unique IDentifiers) containing a combination of alphanumeric characters in following format: {xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx}
3. 3. Select each key and look at "ProductName" key in right-side pane. One GUID key will contain the version number of Office installed in your system "Microsoft Office XP Professional Edition".
4. Select that GUID key and delete following 2 registry entries from right-side pane: DigitalProductID / ProductID
5. Close registry editor and run any Office application e.g. word, excel, etc. It should prompt you to enter a new product key.
6. Enter the desired product key and click on OK. That’s it.

Change Office 2003 Product Key:

1. Open regedit and go to: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Office\11.0\Registration
2. Under "Registration" key, you’ll see one or more GUID (Globally Unique IDentifiers) containing a combination of alphanumeric characters in following format: {xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx}
3. Select each key and look at "ProductName" key in right-side pane. One GUID key will contain the version number of Office installed in your system e.g. "Microsoft Office Professional Edition 2003".
4. Select that GUID key and delete following 2 registry entries from right-side pane: DigitalProductID / ProductID
5. Close registry editor and run any Office application e.g. word, excel, etc. It should prompt you to enter a new product key.
6. Enter the desired product key and click on OK. That’s it.

Change Office 2007 Product Key:

1. Open regedit and go to: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Office\12.0\Registration
2. Under "Registration" key, you’ll see one or more GUID (Globally Unique IDentifiers) containing a combination of alphanumeric characters in following format: {xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx}
3. Select each key and look at "ProductName" key in right-side pane. One GUID key will contain the version number of Office installed in your system "Microsoft Office Professional Edition 2007".
4. Select that GUID key and delete following 2 registry entries from right-side pane: DigitalProductID / ProductID
5. Close registry editor and run any Office application e.g. word, excel, etc. It should prompt you to enter a new product key.
6. Enter the desired product key and click on OK. That’s it.

IMPORTANT NOTES:

1. Take a backup of "Registration" key before deleting the registry entries from right-side pane, so that in case the new product key doesn’t work you can restore the previous key without any problem. To take backup right-click on "Registration" key and select "Export".
2. If you are a x64 bit Windows user, then the key location will be different in registry. Please check following paths:

Office XP: HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Office\10.0

Office 2003: HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Office\11.0

Office 2007: HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Office\12.0