Did you download this from a trustworthy site ? Files found on random file-sharing sites or received via unsolicited emails carry a much higher risk of containing viruses.
Most users prefer the official WinRAR or the free, open-source 7-Zip. vifoult.rar
Use a tool like VirusTotal to upload the file. It will scan the archive against dozens of different antivirus engines to see if anything malicious is hidden inside. Did you download this from a trustworthy site