Unable to deactivate windows xp by modifying the license in the registry

Solution 1:

This may be a little bit too obvious but the official Microsoft Support article has two possible methods for changing the product key. The first one is certainly the one you've already tried, but there is also a second method using a VBScript.

If you copy and paste the VBScript given in microsoft article http://support.microsoft.com/kb/328874 into a text editor like notepad, and then save the file with a .vbs extension (use quotation marks around the file name if you find that the .txt extension is automatically appended).

Then execute that script with the new product key as an argument as shown in the instructions given beneath the script. Obviously if you have noted saved it to the root of your C:\ drive the exact command you'll need to type into the run dialog will include the location where you have saved it. Alternatively you can run this from the command prompt in the same way.

Solution 2:

• Go to windows\system32\
• Rename WPA.DBL and WPA.BAK
• Restart

You should be prompted to activate windows with a new key.

Solution 3:

I have tried so many ways to remove the Windows XP license Key but I was not able to remove it from the computer. However, when I remove WPA.DBL and WPA.BAK file and after that I reboot the computer and then in the start up, it asked me to activate the license and that works perfectly fine for me. I appreciate for your help and Thank you so much!