Boot Windows 8.1 From Usb -

This was the official feature in Windows 8.1 (specifically the Enterprise edition) that allowed you to install and run a full Windows operating system from a USB drive.

1️⃣ – Rufus + Win8.1 ISO (8GB+ USB) boot windows 8.1 from usb

To create a bootable USB drive, you'll need to use a tool like Rufus or the Windows USB/DVD Download Tool. Here, we'll use Rufus: This was the official feature in Windows 8