Because Microsoft no longer sells or supports Windows XP, Internet Archive (Archive.org) has become the primary repository for various versions. Common files include:
Released on , Windows XP Professional x64 Edition was not just a 64-bit version of the original XP. Unlike the standard 32-bit XP (built on the NT 5.1 kernel), the x64 edition was actually based on the Windows Server 2003 (NT 5.2) kernel . This gave it superior stability and performance improvements that the consumer version lacked. Key Technical Advantages windows xp professional x64 edition archive.org
Being based on the Server 2003 codebase, it included early versions of Kernel Patch Protection (PatchGuard) and was naturally immune to many 32-bit malware types. Finding XP x64 on Archive.org Because Microsoft no longer sells or supports Windows