Applies to: Hitman: Absolution – Professional Edition (Steam Version) Common Error: "The program can't start because steamapi.dll is missing from your computer."
Do not panic. You do not have a virus, and your game is not broken. This is one of the most common runtime errors for Steam-based games, specifically affecting the Professional Edition due to its unique DRM and update structure.
Once you restore the file from quarantine and add the game folder to your antivirus exclusions, you will be back to sneaking through the streets of Chicago as Agent 47 in no time.