Make sure the article is well-structured, uses clear headings, and remains objective. Avoid any markdown, just plain text with paragraphs and line breaks. Also, ensure that the keywords related to the movie and Isaimini are included but not in a way that promotes piracy.

Finally, conclude by reiterating the importance of supporting artists through legal means. Maybe add a FAQ section with common questions, like "Is Kandhan Karunai available free legally?" and the answer would be that it's not unless through public domain, which it's not yet.

Now, the user wants an informative write-up. They probably want to know where to download the movie, but I should be careful not to promote piracy. Instead, I should highlight legal issues and maybe suggest legal alternatives. The user also mentioned "single part exclusive," which might mean they're looking for a direct download link in one part, not split into multiple parts. Isaimini is known for providing such files, but again, it's a piracy site.

I need to structure the article with sections: Introduction about the movie, availability on Isaimini, legal considerations, ethical implications, legal viewing options, and a conclusion. Make sure the language is informative but avoids endorsing piracy. Also, mention the risks like malware, viruses, legal consequences, and the harm to creators. Keep the tone educational rather than persuasive, but still guide the reader towards legal options.

I should also verify if "Kandhan Karunai" is available on streaming platforms legally. If so, mention those platforms. If not, still suggest legal alternatives. Since it's a 1968 film, copyright terms might be different. Wait, copyright terms in India are 60 years from the date of release, so 1968 + 60 = 2028, so the movie is still under copyright. So downloading from Isaimini is definitely illegal.