The process will show you how can we extract the Windows XP serial key from the Installed Operating system and the modify it with the n...
To modify the serial key we need a third party software named as "Magical Jelly Bean Key-finder"
1. Download and open "Magical Jelly Bean Key finder" (No need to install).
The open Windows will show the installed operating system version and the serial key (CD Key) that is entered at the time of installation.
2. Now click on "Options" on the menu bar then select "Change Windows Key"
3. A new window will be opened asking for another serial key. Just enter the new Genuine Serial key.
Here Is windows XP service pack 2 and 3 Genuine serial key.
Windows XP Service Pack 2 (SP2) Genuine Serial Key
Windows XP Service Pack 3 (sp3) Genuine Serial Key
MR49R-DRJXX-M6PX2-V96BF-8CKBJ4. After entering the serial key, click on "Change".
5. It will show the Confirmation Message that "Your Product key has been successfully updated. Restart the keyfinder to verify it".
That is it. Now your old Windows XP serial key is successfully updated.
Here is Link To Download It.