While it offers convenience for legacy hardware testing, the inherent security risks and lack of official support make it a dangerous choice for any primary or sensitive computer. Overview
Are you planning to use this for a project, or
The main draw is the "one-click" experience. You don't need to hunt for product keys or use third-party activators after the OS is installed.
This is the biggest dealbreaker. Windows 7 has been out of support since January 2020. It no longer receives security patches, leaving it highly vulnerable to modern exploits like ransomware.
Because these ISOs are created by unknown third parties, there is no way to verify their integrity. Many "preactivated" versions are bundled with hidden malware, keyloggers, or backdoors that can compromise your data the moment you go online.
