Microsoft ended support for Windows XP on April 8, 2014. No official, legal download sources for Windows XP Home Edition SP3 64-bit exist from Microsoft anymore. Additionally, Windows XP Home Edition was never released as a native 64-bit operating system – the 64-bit versions of Windows XP were only available as Windows XP Professional x64 Edition (based on Windows Server 2003 codebase). Windows XP Home Edition was strictly 32-bit (x86).
Unless you absolutely need to address more than 4GB of RAM, stick with . It’s: download windows xp home edition sp3 64 bit
Here is a blog post written with that crucial clarification and safe guidance. Microsoft ended support for Windows XP on April 8, 2014