Windows 7 ISO (either 32-bit or 64-bit).How to create bootable USB in Windows 7 using Rufusīefore creating Windows 7 bootable USB, you need to prepare: Easier way to make bootable USB in Windows 7, 8, 10, 11.How to create bootable USB in Windows 7 using Rufus.What’s more, the application requires no setup so that you can copy it onto a portable device and easily launch it on any computer to create bootable drives. It has built-in support for drive formatting, which means that you don’t have to manually do this before launching Rufus. It is suitable for both casual and experienced users, thanks to the standard and advanced settings it brings. Rufus is a free and open-source utility that helps format and create bootable USB flash drives, such as USB keys, pendrives, memory sticks, etc.