These are NOT product / license keys that are valid for Windows activation.
These keys only select the edition of Windows to install during setup, but they do not activate or license the installation.
When Riot Games introduces the Vanguard anti-cheat to League of Legends, you should STOP playing and you must NOT install the anti-cheat when you get the pop-up. Vanguard is a kernel-level anticheat and these anticheats operate at a privilege level HIGHER THAN YOUR OWN. The anti-cheat can do things that even YOU can't do, without asking or letting you know. It's like Riot installing a camera in every room of your house and getting a copy of every key inside.
Here are just a few examples of what they can do:
For some reason, it is surprisingly hard to create a bootable Windows USB using macOS. These are my steps for doing so, which have worked for me in macOS Monterey (12.6.1) for Windows 10 and 11. After following these steps, you should have a bootable Windows USB drive.
You can download Windows 10 or Windows 11 directly from Microsoft.
After plugging the drive to your machine, identify the name of the USB device using diskutil list, which should return an output like the one below. In my case, the correct disk name is disk2.