I already had a Windows XP SP2 ISO from years ago, along with a valid product key. If you don't have one, you can easily find and download an XP ISO from the internet.

She has an XP Home OEM Key on the side of the computer, and I need the ISO to re-install it. I've tried doing the bittorrent route, but I've only found the retail ISO, or non-English OEM ISO's.

The tinkerer has even shared his ISO on archive.org for anyone craving a nostalgic hit of Windows XP on real 486 iron or in an emulator.