You see a screen with a list of drives, choose the one you inserted/plugged in, and hit Enter.Restart your PC, and while booting, before the Windows logo, tap the Boot Menu key to open it.After completion, Rufus will ask you to restart the PC.Now, click on the Start button and wait a while to finish.Make sure to keep all the default settings as it is.Now, open Rufus to create bootable media for Windows 7.Now follow the following steps to clean-install Windows 7 using the ISO file, If you have your Windows 10 ISO File ready to update your system to Windows 10 Latest Update, all you have to do is boot from the disc or USB thumb drive to start the setup. Note that the above Windows 10 ISO download links are valid for 24 hours, so you must download them within the time period otherwise, you will have to repeat the same steps again.
