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can't install sp1 or sp2!

By i694fun ·
I'm not able to update my XP Pro OS because of a problem with authentication on the volume licensing product key, I have the original 25 digit key, but microsoft says that it is not valid! Thus, I cannot update even to sp1, I recently had to re-install XP due to viruses, but I didn't low level format the hard drive, did I need to? my error message says this: Windows XP Servvice Pack could not install: The product key used to install windows may not be valid. To get more information on why you have recieved this message visit: www.howtotell.com

Can anyone help?
Thanks...
Paul........

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by essp333 In reply to can't install sp1 or sp2!

Edit the registry of the your machine.
Use Regedit and find: HKEY_LOCAL_MACHINE\Software\Microsoft\WindowsNT\Current Version\WPAEvents
In the right pane, right-click the ODBETimer binary value and select Modify. Change at least one character of this
value to either a number from 0 to 9 or to a letter from A to F, and then click OK and close the Registry Editor. This
renders the current product key invalid and deactivates Windows.

Reactivate Windows using your new product key.

Click Start | Run and enter the command %systemroot%\system32\oobe\msoobe /a

Windows will launch the Product Activation Wizard.
Select the option to telephone a Microsoft customer service representative to activate Windows.
Select the Change Product Key option and enter your new product key.
Click Update and close the window.
If Windows returns you to the previous screen, just select the Remind Me Later option. When the wizard is
finished, reboot the system.
When Windows reboots, your next step will depend on which Windows XP version you are using. If you have XP
Home or Professional, you'll be prompted to reactivate your copy of Windows through the normal activation process. If
you have XP Corporate, no activation is required and your machine should have a valid product ID.

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