Instead of downloading a random file from an unverified source—which could contain malware—try these verified solutions: 1. Check Your Antivirus Quarantine
Before downloading anything, check if your antivirus software has simply hidden the file. Open or your third-party antivirus. Navigate to Protection History or Quarantine . Steam-api64r.dll File Download
If you are using a non-licensed copy of a game, the custom DLL required to run it might be missing or blocked by Windows Defender. How to Fix Steam-api64r.dll Errors Safely
Taking one day at a time.