Users must create a bootable USB drive or DVD using the ISO file.
While Windows 7 Ultimate is a nostalgic and efficient OS, it is important to remember that it no longer receives security updates from Microsoft. Using it on a machine connected to the internet carries risks. For many, however, it remains the "top" choice for reviving older laptops or running specific legacy software that isn't compatible with Windows 10 or 11.
Avoid modified “light” versions or torrents with unknown sources. The safest ISO files are original, untouched MSDN copies.