If the file was accidentally deleted or didn't download correctly, Steam can fix it automatically. Open your Steam Library. Right-click Dark Souls II: Scholar of the First Sin Properties Installed Files Verify integrity of game files Piracy / "Crack" Issues
Avoid downloading .dll files from random "DLL fixer" websites. These files are often outdated or bundled with malware. Always use Steam's verification tool to get the official file. steamapi64dll dark souls 2