Windows Defender and other antivirus suites are aggressive. They see the way steam-api.dll interacts with the system memory and flag it as malware. They delete the file while you are trying to play.
If your game was working yesterday but fails today, your antivirus is likely the culprit. fallout new vegas steam-api.dll
: A network hiccup during your initial Steam download can lead to missing system files. Windows Defender and other antivirus suites are aggressive
: If you are using the New Vegas Script Extender (NVSE) , it requires a specific version of this DLL to hook into the game process. fallout new vegas steam-api.dll
Follow these steps in order to restore your game without risking your system's security. 1. Verify Integrity of Game Files (The Safest Method)