Why You Can't Install Windows XP on a PS3: Architecture & OS Incompatibility

Impossible. Fundamental incompatibilities prevent Windows XP on PlayStation 3:

CPU Architecture: PS3 uses Cell Broadband Engine (PowerPC-based PPE + 7 SPEs). Windows XP is x86 (32-bit) only. No x86 instruction set = no boot.
Proprietary Hypervisor: PS3's GameOS runs under a locked-down hypervisor; no raw hardware access for foreign OS installation.
No Drivers: Zero Windows drivers exist for PS3 GPU (RSX), Bluetooth, BD drive, controllers, etc.
Secure Boot Chain: Cryptographically signed bootloaders prevent unsigned code execution.

Remote Desktop: Stream Windows from a PC (Moonlight/Sunshine, Steam Link, Parsec).
Linux (Historical): "OtherOS" (Yellow Dog Linux, Fedora) was officially supported on fat PS3s pre-2010 firmware 3.21—removed by Sony. Not Windows.
RPCS3 (PC Emulator): Play PS3 games on a Windows/Linux PC instead.

The PS3 is a fixed-function appliance, not a general-purpose computer.

PlayStation 3