Proxmox
Requirements:
The Machine where to install
USB Drive to have a bootable Proxmox image
Get the application Rufus:
Rufus - The Official Website (Download, New Releases)
Rufus is a small application that creates bootable USB drives, which can then be used to install or run Microsoft Windows, Linux or DOS. In just a few minutes, and with very few clicks, Rufus can help you run a new Operating System on your computer…
Download the latest proxmox version from:
Download Proxmox software, datasheets, agreements

In Rufus configure the image downloaded previously and click start to update the USB drive with the necessary files.

Now insert the USB drive in the computer where we want to install proxmox and run the installation wizard untill the end.