This article provides everything you need to know about the process, from system requirements to a step-by-step installation guide. System Requirements for ChromeOS Flex
Chrome OS Flex is the gold standard for hardware recycling . It is not a full replacement for a Windows PC, but it is the absolute best "kiosk mode" operating system available for free. Just ensure you check the certified hardware list and accept the lack of Android Apps before you wipe your drive.
: Use the official Recovery Utility method. If you need an ISO for archiving or specific tools, convert the .bin image yourself using recovery tools.
ChromeOS Flex Download ISO 64-bit: The Ultimate Guide to Reviving Your Old PC
For power users, Flex includes support for Linux (Debian).