Windows Xp On Uefi System 2021 — Install

The Impossible Dream: How to Install Windows XP on a UEFI System in 2021 (and Beyond)

Use virtualization for compatibility, security, and ease.
If physical installation is required, use older hardware with BIOS/CSM support.
Avoid exposing an XP machine to the internet; isolate it and use modern host protections.

Convert your disk to MBR (loses GPT features).
Use a UEFI shell to manually launch the XP x64 installer.
Install, then immediately install a modern boot manager (like rEFInd or GRUB2) to chainload XP.

Step 3: Install and Configure GRUB2

UEFI Secure Boot blocks unsigned EFI applications (and signing costs $99/year).
No support for GPT disks – still requires MBR.
NVMe drives still invisible.
Abandoned project – no updates for modern UEFI 2.7+.