If you have a second PC with a working copy of Hitman: Absolution Professional Edition:
Security software often flags .dll files as "false positives," especially if they are modified or located in a game directory.
If none of the above steps work, try reinstalling Hitman: Absolution - Professional Edition.
. This file is a Valve library used for Steam game authentication. If it is missing or flagged, it is often because antivirus software has quarantined it during installation. Common Fixes for the Missing DLL Check Antivirus Quarantine
