If you have verified the file is legitimate, you can extract its contents using these steps:
Ensure the file is actually a .rar . Attackers often name files things like themgntcway2.rar.exe to trick users who have "Hide extensions for known file types" enabled in Windows. Download themgntcway2 rar
If you must open it, ensure you are using the latest version of WinRAR or 7-Zip. Older versions of these tools had vulnerabilities that allowed malicious archives to run code just by being opened. How to Open a RAR File (If Safe) If you have verified the file is legitimate,