Look at your browser's download manager ( Ctrl+J in most browsers) to see which website it came from.
Before opening any unknown .rar file, prioritize security to avoid potential malware:
If the file name was part of a larger set (e.g., eys145.part1.rar ), ensure you have all parts in the same folder before trying to extract. eys145.rar
Use a reputable tool like Malwarebytes or Windows Security before extracting.
If you found this file on your computer and don't remember downloading it: Look at your browser's download manager ( Ctrl+J
Right-click the file and select Properties to see when it was created.
If you can tell me or what you expect to be inside , I can help you figure out exactly what it is. If you found this file on your computer
Use 7-Zip (free/open-source) or the official WinRAR . macOS: Use The Unarchiver or Keka . Linux: Use the unrar command-line utility. 🔍 Identifying the Origin