This problem may occur if a file that the Windows Product Activation
(WPA) requires is damaged or missing. This behavior occurs if one or
both of the following conditions are true:
- A third-party backup utility or an antivirus program interferes
with the installation of Windows XP.
- A file that WPA requires is manually modified
you can try this
http://forums.techarena.in/operating...ms/1127102.htm
--
Aldridge