Only open files from reputable websites or known senders. Files found on obscure forums or peer-to-peer networks carry higher risks of containing malware.
You will need software capable of decompressing the RAR format. The original developer's tool for the .rar format. GB03Luc02b rar
Use a multi-engine scanner like VirusTotal to check the archive before extraction. Even if the archive itself isn't a virus, it can contain malicious executables. Only open files from reputable websites or known senders