When the version of Windows on USB / DVD is the same you have already installed and installation is started by launching setup.exe from USB / DVD, it's called a repair installation which is used to fix various Windows issues all your data and software will remain intact but Windows system files will be overwritten. WinSetupFromUSB es un programa de Windows, que prepara flash multiboot USB o disco fijo para instalar cualquier versión de Windows desde 2000 / XP, arranque varios Linux y BSD sabores, así como Windows, Linux, DOS y otras utilidades. Windows 10 - Upgrade Installation - Windows 10 Forums All your installed software will be kept, as well as your personal files, and Windows will be upgraded. Starting the setup from existing installation by launching the setup.exe from USB or DVD install media performs an in-place upgrade installation. Windows 10 - Clean Install - Windows 10 Forums

If the computer already contained an older Windows installation, its files will be moved to folder Windows.old, you can then copy your personal files and folders from there to your new user folders.

You have to then reinstall all your software, Windows will be as if it was first time ever you have started that PC, new and fresh. Booting the computer with USB or DVD install media will perform a so called clean install.

Win usb setup