: If the file was found in a security context, do not open it on your primary machine. Upload the hash or file to VirusTotal to see if it has been analyzed before.
If you have the file and need to investigate its contents for a write-up, follow these standard steps: A55D98C.rar
: If you need the files in a more standard format, you can use a RAR to ZIP Converter available on the Microsoft Store. RAR To ZIP Converter,Opener - Microsoft : If the file was found in a