Most downloads come in a .zip or .rar format. Use WinRAR or 7-Zip to extract it.
Most antivirus programs will flag modified game files as "HackTool" or "Trojan." While sometimes these are false positives, you should never assume a file is safe.
If you are unsure, run the file through a service like VirusTotal before opening it. How to Install the File Properly
If you'd like to get your game running smoothly, I can help you further if you tell me: What are you using (Windows 10, 11)?