You might be wondering why anyone would install a two-decade-old operating system. Here are the legitimate use cases for the :

If you are looking for an official Service Pack 3 installer for Windows XP x64, you won't find one. Microsoft’s release cycle for the 64-bit version of XP was entirely different from the standard 32-bit version.

Microsoft officially ended support for Windows XP on April 8, 2014. This means they no longer host the ISO files on their public servers for the general public. Consequently, users are forced to turn to third-party repositories, torrent sites, and "abandonware" archives.

Today, the search for a "Windows XP x64 SP3 ISO" usually belongs to retro-computing enthusiasts and digital archivists.