Call Of Duty Infinite Warfare Steam-api64r.dll Missing |best| May 2026

The error message indicating steam-api64r.dll is missing in Call of Duty: Infinite Warfare

typically points to a file being quarantined or deleted by your antivirus software

. This specific DLL is often a modified version used in certain releases (such as those from FitGirl Repacks ) and is frequently flagged as a "false positive". Core Solutions Check Antivirus Quarantine

: Open your antivirus software (e.g., Windows Defender) and look for steam-api64r.dll Quarantine Protection History section. If found, select call of duty infinite warfare steam-api64r.dll missing

and then add the file or the entire game folder to your software's Exclusions list to prevent it from being deleted again. Verify Game Files (Legit Versions) : If you own the game on , you should restore the official file (usually named steam_api64.dll ) by right-clicking the game in your , selecting Properties Installed Files , and clicking Verify integrity of game files Re-extract or Reinstall with AV Disabled

: If the file is completely gone and not in quarantine, you may need to re-run the installer or re-extract the game files while your antivirus is temporarily turned off. Ensure you turn it back on once you have added the installation directory to your exclusion list. Advanced Troubleshooting steam_api64.dll Error Windows 11 | 2x FIX | 2023

Fix 6: Disable Full-Screen Optimizations and Run as Admin

Windows 10 and 11 have overlay features that conflict with custom DLLs. The error message indicating steam-api64r

Navigate to your game folder: ...\Steam\steamapps\common\Call of Duty Infinite Warfare
Right-click iw7_ship.exe (the game executable) > Properties.
Go to Compatibility tab.
Check Disable fullscreen optimizations.
Check Run this program as an administrator.
Click Apply > OK.
Launch the game.

2. Verify game files (Steam)

Open Steam → Library
Right-click Call of Duty: Infinite Warfare → Properties
Go to Installed Files → Verify integrity of game files
Steam will re-download missing or corrupted DLLs

1. Antivirus or Windows Defender Quarantine (Most Common)

Modern antivirus software uses heuristic analysis to detect malware. Because steam-api64r.dll is a non-standard DLL that hooks into Steam (a common target for game cracks/pirates), some overzealous antivirus programs flag it as a false positive and automatically quarantine or delete it.

Introduction

Few things are as frustrating as settling in for a gaming session, clicking "Play" on Call of Duty: Infinite Warfare, and being met with a cryptic error window instead of the main menu. Among the most common and stubborn launch errors for this title is the “steam-api64r.dll missing” or “steam-api64r.dll not found” notification.

This error is specific to the Steam version of Infinite Warfare and can occur immediately after installation, after a Windows update, or following a Steam client update. The good news? It is almost always fixable without reinstalling the entire 70+ GB game. Fix 6: Disable Full-Screen Optimizations and Run as

This comprehensive guide will explain what this file is, why it goes missing, and provide seven proven solutions to get you back on the battlefield.

4. Manually register the DLL (if file exists but isn’t found)

Locate steam-api64r.dll in the game folder (e.g., \Steam\steamapps\common\Call of Duty Infinite Warfare\)
Copy it
Paste to C:\Windows\System32\
Run Command Prompt as administrator:
```
regsvr32 steam-api64r.dll
```

7. Check for Malware

Malware can sometimes masquerade as or interfere with DLL files. Run a full scan of your computer with your antivirus software.

Q: Can I just download the standard steam_api64.dll and rename it?

A: Absolutely not. The steam-api64r.dll is a custom build. Renaming a different DLL will cause either a crash at launch (0xc000007b error) or an infinite loading screen.

Fixing the "steam-api64.dll Missing" Error in Call of Duty: Infinite Warfare

Few things are more frustrating than settling in for a session of Call of Duty: Infinite Warfare only to be stopped dead in your tracks by a system error. One of the most common issues players encounter is the dreaded "steam-api64.dll missing" error message.

This error prevents the game from launching, but the good news is that it is usually easy to fix. Below, we break down why this happens and provide step-by-step solutions to get you back into the fight.