A final dialog box appeared:
Ventoy lets you copy multiple ISOs to one USB and choose which to boot. windows 121 iso file install
This guide explains how to obtain a Windows 121 ISO (assumed to mean a hypothetical future Windows release named "Windows 121"), create installation media, and perform a clean install or upgrade. Assumptions: the user wants step‑by‑step instructions for preparing, verifying, and installing from an ISO on a typical UEFI/GPT PC. If you meant a different edition or build, say so. A final dialog box appeared: Ventoy lets you
Option B — Microsoft Media Creation Tool (if offered for Windows 121): create installation media
Let’s get one thing straight: You haven’t found a leaked copy of a future operating system. You’ve found a ghost.