Imguimenulol.rar File
Simply having the .rar file on your computer is generally safe, as compressed files cannot harm your system until they are extracted and run.
You will need a tool like WinRAR or 7-Zip to open the archive.
To work, these archives usually contain .exe or .dll files that must be run alongside your game. 2. Is it safe to open?
Files like this are frequently flagged by antivirus software. While some detections are "false positives" because the software "hooks" into other programs like a virus would, many are actually malicious.