Need help to download windows xp iso for service pack 3

It's important to note that Microsoft no longer offers official link for downloading Windows XP ISO file, as XP has reached end-of-life support since April 2014. Downloading Windows XP ISO from unofficial sources carries significant risks, including malware, viruses, or corrupted files.

Here's what I recommend If you are going to Download Windows XP ISO:

• Use Original Installation Media:  
  If you have an original Windows XP installation CD or DVD, that is the safest and most reliable source for reinstalling. You can create a bootable USB or use the disc directly.
• Check with Your Manufacturer or Vendor:  
  For industry or enterprise systems, your hardware vendor or IT department may have an official ISO or recovery media. Contact them for a legitimate copy.
• Look for OEM or Recovery Partitions:  
  Some machines come with recovery partitions or recovery disks provided by the manufacturer. Use those if available.
• Licensed Retail Copies:  
  If you purchased XP legitimately, you should have a product key and installation media. You can contact Microsoft Support for guidance, though official downloads are no longer available.