Problem: Genuine Validation Status: Not Activated
Try the following:
1. Reboot your computer into "Safe Mode".
A description of the Safe Mode Boot options in Windows XP
http://support.microsoft.com/kb/315222/en-us
2. Go to Start > Run and type: %systemroot%\system32 then press the Enter key.
3. Locate these two files: wpa.dbl and wpa.bak
4. Rename the wpa.dbl file to wpaold.dbl and wpa.bak to wpaold.bak
5. Reboot your computer into Normal Mode. This will force activation on the following boot. Sometimes if those files get corrupted, they can cause this type of problem.
If the above procedure does not solve the problem, then try:
Guided Help to remove the script that interferes with Windows activation: http://support.microsoft.com/kb/312295/en-us