Use a tool like Rufus to write the ISO to a USB drive (at least 8GB required).
Windows 7 reached end-of-support in January 2020. Running this OS in 2026 requires extreme caution: en windows 7 professional with sp1 x64 dvd u 676939iso link
If your goal is simply to run old software, it is much safer to run Windows 7 as a inside Windows 10 or 11 using software like Oracle VirtualBox or VMware Player. This allows you to use the legacy OS while keeping your host system protected by modern security. Use a tool like Rufus to write the