Here you can download the official Windows XP Media Center Edition (2002, 2004, 2005) ISOs for free.
Windows XP is a major release of Microsoft’s Windows NT operating system. It was released to manufacturing on August 24, 2001, and later to retail on October 25, 2001. It is a direct upgrade to its predecessors, Windows 2000 for high-end and business users and Windows Me for home users, and is available for any devices running Windows NT 4.0, Windows 98, Windows 2000, or Windows Me that meet the new Windows XP system requirements.
Download Windows XP Media Center Edition 2002:
Architecture: x86 (32-bit)
File Format: ISO
Download: Archive.org
Key: C82GJ-YH627-72GBT-R7XV7-M7Y4B
Download Windows XP Media Center Edition 2004:
Architecture: x86 (32-bit)
File Format: ISO
Download: Archive.org
Download Windows XP Media Center Edition 2005:
Architecture: x86 (32-bit)
File Format: ISO
Disk 1: Archive.org
Disk 2: Archive.org
Key: C4BH3-P4J7W-9MT6X-PGKC8-J4JTM