Microsoft no longer hosts a public Windows 7 ISO download page.
If you provide more details about your goal (e.g., repairing an old PC, running legacy software), I can guide you to the safest, most legitimate path forward. windows 7 service pack 3 iso file download link
Downloading modified operating system files from third-party websites poses severe security risks. Because these files do not come from Microsoft, they are not verified and can easily be weaponized by bad actors. Microsoft no longer hosts a public Windows 7