Microsoft has stopped issuing security updates for Windows 7. This means that any new "holes" or vulnerabilities discovered by hackers will never be patched. Using an unsupported OS is like living in a house with locked doors but an open, unguarded back door that the landlord refuses to fix.
Windows 7 reached its End of Life (EOL) stage years ago. It no longer receives critical security patches from Microsoft. If you must use Windows 7, restrict its internet access, use a robust third-party firewall, and do not use it for sensitive tasks like online banking or managing personal data. Windows 7 Iso Archive Org
Background
Once you have a verified ISO, you can create installation media: Microsoft has stopped issuing security updates for Windows 7
These are standard retail disc images meant for consumer licenses purchased in stores. They usually include options for Home Premium, Professional, and Ultimate editions. Windows 7 reached its End of Life (EOL) stage years ago