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If you want to explore this world, start with (by Zone94). It is the most vetted, includes all POSReady updates up to 2019, and has a driver pack for almost any motherboard made before 2019.

XP only supports BIOS (Legacy) boot. However, a Chinese developer known as "wuyou" created a bootloader called "XORBOOT" and a modified bootmgr that allows XP to boot from a GPT disk using a UEFI Class 3 (no CSM) system. It works by loading a virtual BIOS (vBIOS) into RAM before handing off to ntldr . The stability is... questionable, but it proves the concept. Part IV: The Dark Side – Backdoors and Botnets Here is the warning you must heed. The XP modding scene is unregulated.

A modded (or "modified") ISO is not a simple pirated copy. It is a surgical re-engineering of the OS kernel, shell, and services. For enthusiasts, legacy industrialists, and retro-gamers, these ISOs represent the "uncanny valley" of operating systems—a familiar face on a hyper-modernized body.