Downloading ISO files from random "software download" sites is dangerous. Many of these sites bundle malware, spyware, or bitcoin miners into the installation files. If the site does not provide a SHA-1 hash that you can verify against an official MSDN database, do not download it.
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The desire to download stems from a nostalgia for an OS that was stable, lightweight, and user-friendly. However, the scarcity of official links and the complete lack of security support make this a risky endeavor. Downloading ISO files from random "software download" sites