steam_api.dll steam_api64.dll ) error in Resident Evil 4 HD occurs when the game cannot communicate with the Steam client to verify ownership or load user profiles. This is most commonly caused by antivirus software
If the error started immediately after you installed a new antivirus update or ran a scan: steam apidll resident evil 4 hd
C:\Program Files (x86)\Steam\steamapps\common\Resident Evil 4\Bin32\ steam_api