When trying to extract files from RAR archive, I come across error message stating, “Unexpected end of archive”. What’s wrong? How to extract them?

Try repairing with WinRAR. See this link: http://www.wikihow.com/Use-Winrar-to...d-ZIP-Archives

You haven't downloaded the whole rar file. Download it again.

There are few reasons for getting unexpected end of archive RAR error; you usually encounter this error when you start a downloading process and after downloading few GBs (gigabytes) or MBs (megabytes), it stops and displays a message as download complete.
Given below are the steps which might help you in recovering some files from your corrupted RAR archive:
• Download RAR Fix Toolbox software and install the software to your computer desktop/laptop
https://www.fixtoolbox.com/rarfix.html

• Launch the repair application and stick to the procedure
• Hit the “Browse” button to choose the RAR file which is to be repaired
• Initialize the repair process by clicking on “Repair” button
• The program starts the repair process
• Monitor the repair process via progress bar
• After finishing the repair process, the tool displays all the files and folders from the RAR file
• Click on “Next” button
• Finally, save the repaired files to your desired destination location by making use of “Save” option’

lolwinrar

It isn't even free software, so use 7-zip instead

OP / Lavigne's answer looking like setup / spam to me but I'm not sure if I should report.