A bootable USB is the tool every Windows repair and fresh install starts with. This guide gives you both routes from the video - Rufus, free and precise, and PowerISO, the image-file all-rounder - with every setting explained and every warning kept in the open.
You need three things: an ISO file from an official source, a pen drive of 8 GB or more, and one of these two programs. Both routes end at the same place - a USB your PC can start Windows Setup from. They differ in how much control you get and in what they cost, and this guide is honest about both. Follow the Rufus route if you want the free tool with every setting visible; follow the PowerISO route if that is the program already on your desk.
Three things: a Windows or Linux ISO file downloaded from the official source, a USB pen drive of 8 GB or more (16 GB is comfortable), and one of the two tools from the video. Rufus is a small portable program of a few megabytes from rufus.ie. PowerISO is an installed program from poweriso.com. One honest line that applies to both routes in this guide: creating bootable media erases the USB drive completely. There is no keep-my-files option in either tool, so copy anything you need off the pen drive before you begin.
Rufus is free and open source, and it is the more precise of the two tools. It runs without installation - just launch the downloaded file.
PowerISO is best known as an all-in-one disk image program - it creates, edits, converts, mounts and burns ISO, BIN, NRG and its own DAA files. Making a bootable USB is one of its tools, and it is deliberately simple: it asks far fewer questions than Rufus.
Notice what is missing: no partition scheme choice, no file-system choice. PowerISO decides those itself. That is convenient for a simple job, and limiting when a particular PC refuses to boot - which is exactly where Rufus's controls earn their keep.
The video's title calls both of them free tools, and that needs one correction in plain words. Rufus is genuinely free - open source, no licence, no limits, no nag screens. PowerISO is shareware. Its unregistered trial shows a register reminder when it starts and cannot create or edit image files larger than 300 MB; the maker states that all other functions, including the bootable USB writer, work the same. So the trial is enough to follow this guide - but if PowerISO stays on your PC, it is paid software and the honest thing is to register it. Prices change, so check the official site rather than trusting any number printed elsewhere.
A burned USB does nothing until the PC is told to start from it. Restart the target PC and open its one-time boot menu - commonly F12, F9, Esc or F8, and the first startup screen usually names the key. Choose the entry beginning with UEFI: followed by your drive's name. If the screen says Press any key to boot from USB, press a key within a few seconds, or the PC simply boots its old Windows and you will think the USB failed when it was never tried.
Both tools are shown live in the video - every click, every setting, and the first boot from the finished USB.
▶️ Watch Full VideoNo, and this guide will not pretend otherwise. Rufus is free and open source with no limits. PowerISO is shareware - the unregistered version shows a registration reminder at startup and cannot create or edit image files larger than 300 MB, though its other functions, including the bootable USB writer, work. If you keep using PowerISO, it is a paid product; buy the licence from the official site, poweriso.com.
Rufus, for most people. It is free, portable, and it lets you choose the partition scheme to match your PC, which is the setting that most decides whether the USB boots at all. PowerISO is a reasonable second route if you already own it or you also need its image editing, mounting and disc burning features - but for a plain installer USB it gives you less control, not more.
An 8 GB drive is the practical minimum for a Windows 11 installer, because the ISO is over 5 GB. A 16 GB drive is more comfortable and leaves Rufus or PowerISO working room. Speed matters as much as size - a very old, slow pen drive makes both the burning and the installation drag, and worn-out drives are a common hidden cause of install failures.