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http://support.microsoft.com/en-us/kb/328874

Prerequisites

You must have a valid product key before you can use the information in this article. To obtain a valid product key, click the following link to contact the Microsoft Volume Licensing Service Center:

Steps to change the volume licensing product key

This article describes two methods for how to change the Windows XP product key after a Volume Licensing installation to resolve the issue. One method uses the Windows Activation Wizard graphical user interface (GUI) and the other method uses a Windows Management Instrumentation (WMI) script. The Activation Wizard method is easier. However, if you must change the product key for multiple computers, the script method is more suitable.

Method 1: Use the Activation Wizard

Important This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft Knowledge Base:

If you only have a few volume licensing product keys to change, you can use the Activation Wizard.

Note We recommend that you run System Restore to create a new restore point before you follow these steps.

Deactivate Windows

1. Click Start, and then click Run.
2. In the Open box, type regedit, and then click OK.
3. In the navigation pane, locate and then click the following registry key:

   HKEY_LOCAL_MACHINE\Software\Microsoft\WindowsNT\Current Version\WPAEvents

4. In the topic pane, right-click OOBETimer, and then click Modify.
5. Change at least one digit of this value to deactivate Windows.

Reactivate Windows and add new product key

1. Click Start, and then click Run.
2. In the Open box, type the following command, and then click OK.

   %systemroot%\system32\oobe\msoobe.exe /a

3. Click Yes, I want to telephone a customer service representative to activate Windows, and then click Next.
4. Click Change Product key.
5. Type the new product key in the New key boxes, and then click Update.

   If you are returned to the previous window, click Remind me later, and then restart the computer.

6. Repeat steps 1 and 2 to verify that Windows is activated. You receive the following message:

   Windows is already activated. Click OK to exit.

7. Click OK.
8. Install Windows XP Service Pack 1a or a later version of Windows XP.

If you cannot restart Windows after you install Windows XP SP1 or a later version of Windows XP, try the following steps:

1. Restart your computer and start pressing F8 until you see the Windows Advanced Options menu.
2. Select Last Known Good Configuration from the menu and press ENTER. This option starts Windows by using a previous good configuration.
3. Repeat steps 1 through 8 under “Reactivate Windows and add new product key.”

If you can install SP1 or a later version of Windows XP and you can restart Windows, you have resolved the issue. If the issue has not been resolved, try method 2 or see the “Next Steps” section for more troubleshooting resources.

Method 2: Use a script

If you must change the product key for multiple computers, we recommend this method. You can create a WMI script that changes the volume licensing product key, and then deploy this script in a startup script.

The sample ChangeVLKey2600.vbs script and the sample ChangeVLKeySP1 script that are described in this section use the new volume licensing key that you want to enter as a single argument. It is in a five-part alphanumeric form.

We recommend that you use the ChangeVLKey2600.vbs script on Windows XP-based computers that are not running Windows XP SP1 and later versions of Windows XP and that you use the ChangeVLKeySP1.vbs script on Windows XP-based computers that are running Windows XP SP1 and later versions of Windows XP. These scripts perform the following functions:

• They remove the hyphen characters (-) from the five-part alphanumeric product key.
• They create an instance of the win32_WindowsProductActivation class.
• They call the SetProductKey method with the new volume licensing product key.

You can create a batch file or a cmd file that uses either of the following sample scripts, together with the new product key as an argument. You can deploy it as part of a startup script or run it from the command line to change the product key on a single computer.

Examples

For more information about how to script the product key, visit the following Microsoft Web site:

ChangeVLKeySP1.vbs

' 
' WMI Script - ChangeVLKey.vbs
'
' This script changes the product key on the computer
'
'***************************************************************************

ON ERROR RESUME NEXT

if Wscript.arguments.count<1 then
   Wscript.echo "Script can't run without VolumeProductKey argument"
   Wscript.echo "Correct usage: Cscript ChangeVLKey.vbs ABCDE-FGHIJ-KLMNO-PRSTU-WYQZX"
   Wscript.quit
end if

Dim VOL_PROD_KEY
VOL_PROD_KEY = Wscript.arguments.Item(0)
VOL_PROD_KEY = Replace(VOL_PROD_KEY,"-","") 'remove hyphens if any

for each Obj in GetObject("winmgmts:{impersonationLevel=impersonate}").InstancesOf ("win32_WindowsProductActivation")

   result = Obj.SetProductKey (VOL_PROD_KEY)

   if err <> 0 then
      WScript.Echo Err.Description, "0x" & Hex(Err.Number)
      Err.Clear
   end if

Next

ChangeVLKey2600.vbs

' 
' WMI Script - ChangeVLKey.vbs
'
' This script changes the product key on the computer
'
'***************************************************************************

ON ERROR RESUME NEXT

if Wscript.arguments.count<1 then
   Wscript.echo "Script can't run without VolumeProductKey argument"
   Wscript.echo "Correct usage: Cscript ChangeVLKey.vbs ABCDE-FGHIJ-KLMNO-PRSTU-WYQZX"
   Wscript.quit
end if

Dim VOL_PROD_KEY
VOL_PROD_KEY = Wscript.arguments.Item(0)
VOL_PROD_KEY = Replace(VOL_PROD_KEY,"-","") 'remove hyphens if any
Dim WshShell
Set WshShell = WScript.CreateObject("WScript.Shell")
WshShell.RegDelete "HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\WPAEvents\OOBETimer" 'delete OOBETimer registry value
for each Obj in GetObject("winmgmts:{impersonationLevel=impersonate}").InstancesOf ("win32_WindowsProductActivation")

   result = Obj.SetProductKey (VOL_PROD_KEY)

   if err <> 0 then
      WScript.Echo Err.Description, "0x" & Hex(Err.Number)
      Err.Clear
   end if

Next

The following example shows how to use the ChangeVLKeySP1.vbs script from a command line:

1. Click Start, and then click Run.
2. In the Open box, type the following command, where AB123-123AB-AB123-123AB-AB123 is the new product key that you want to use, and then click OK:

   c:\changevlkeysp1.vbs ab123-123ab-ab123-123ab-ab123