Do not download DLLs from random websites. They are often infected or for the wrong game version. However, you can extract a legitimate copy.
Let’s move from the easiest, non-destructive fixes to the more advanced solutions. steam-api64 dll black ops 3
Run this verification twice. Sometimes Steam misses lingering registry hooks on the first pass. Do not download DLLs from random websites
Security software often flags this file as a "false positive," especially if you are using game mods or unofficial versions. not just a game component.
The DLL is a Steam component, not just a game component.