If you have verified the file is safe and intended for use (e.g., as a game plugin or mod):

: Before extracting, upload the file to VirusTotal or use Windows Defender to check for Trojans or injectors.

Find your game's directory (e.g., C:\Program Files (x86)\Steam\steamapps\common... ).

Move the .dll or .exe files from the extracted folder into the game's main folder. :