The Internet Archive holds a legal exemption for abandonware. Search for:
Windows XP Professional x64 Edition (released in 2005) is fundamentally different from the standard 32-bit (x86) version because it is based on the Windows Server 2003 codebase
: This is the most common repository for historical software. You can find "untouched" MSDN (Microsoft Developer Network) images here, which are preferred for stability and security. Search for Windows XP Professional x64 Edition ISO en_win_xp_pro_x64_with_sp2_vl
