That’s not even remotely the same, and you know it.

RFC 1149 for the win!

It has a paywall now. But when it was originally posted, there wasn’t one for a few hours. And it definitely wasn’t done on purpose.

Didn’t say it wasn’t bootable, but built incorrectly. In this case, using dd. I’ve seen the same results even using the official USB creation tool from Microsoft, but for whatever reason, Rufus always works. I’d just suggest building the media a different way without using dd.

The other thing you can do, since it sounds like you can still boot into Windows on his PC, is to use the Reset This PC process. That will download the media, nuke the drive and delete all the user data (you can choose to keep it also), and reinstall Windows to an out-of-box state. It does not require a USB.

Unfortunately, that doesn’t let you leverage the Rufus tools that will automatically turn off system requirements, or create a local user, at USB creation time. Offers way more than using just straight dd.

Example from another site’s article:

Usually for #3 that means the USB is built incorrectly. If you create the ISO with Rufus, it will work, and you can get around #1 and #4 that way as well.

Win11, as far as installs go, is pretty much exactly what Win10 was.