: There is a known "Rar ransomware" that encrypts your files and demands payment in Bitcoin to unlock them.
If you have already downloaded such a file, follow these safety steps: Purchasing information - Techs Helps Download Registry rar
The only common legitimate "registry" archive is a file usually named rarkey.rar or rarreg.key . : There is a known "Rar ransomware" that
: This is the registration key you receive via email after purchasing a WinRAR license. Download Registry rar
: You typically just double-click it or place it in the WinRAR installation folder to register the trial version.
: It should only come from an official RARLAB or Win-RAR email. How to Safely Handle Suspected Registry Files