: If you downloaded this from a third-party site (not Steam or GOG), it likely contains modified files that trigger security alerts.
If you can tell me (e.g., in a specific folder or an antivirus pop-up), I can give you more specific advice.
: Upload the .zip file to VirusTotal to see if multiple engines flag it. If only 1 or 2 engines flag it as "Generic," it is likely a false positive.