You need another computer, so you be able to download a windows ISO file, here is the [https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&uact=8&ved=2ahUKEwihkdPux8fcAhWxhOAKHRYhCoMQFjAAegQIARAB&url=https%3A%2F%2Fwww.microsoft.com%2Fsoftware-download%2Fwindows10&usg=AOvVaw3TeDF3zlRT-8GgCsmtGtR7|Download Link] for Windows 10
Then, with any utility you can make that iso boot-able from any USB drive, I use RUFUS app to do it.
here is the [https://rufus.akeo.ie/downloads/rufus-3.1.exe|Rufus download link]