How To Fix Steamapi64rdll Missing Error In Black Ops 3 Verified -

To fix the steam_api64.dll missing error in Call of Duty: Black Ops 3

, the most effective verified solution is to verify the integrity of your game files through Steam. This process scans your installation and automatically redownloads any missing or corrupted files, including DLLs. Verified Fixes for Black Ops 3 Verify Integrity of Game Files: Open your Steam Library.

Right-click on Call of Duty: Black Ops III and select Properties. Go to the Installed Files (or Local Files) tab.

Click Verify integrity of game files... and wait for the process to complete.

Restore Quarantined Files: Antivirus programs often flag steam_api64.dll as a false positive and move it to quarantine.

Open your antivirus (like Windows Security) and check the Protection History. To fix the steam_api64

If the file is listed as "Threat Quarantined," select Actions > Restore.

Run a System File Checker (SFC) Scan: This can repair underlying Windows system errors that might be affecting DLL registration. Open Command Prompt as an administrator. Type sfc /scannow and press Enter.

Manual DLL Replacement (Caution): As a last resort, you can download the missing file from a reputable source like DLL-files.com .

Ensure you download the correct 64-bit version and place it directly into the Black Ops 3 installation folder (usually found in steamapps/common/Call of Duty Black Ops III).

To fix the steam_api64.dll missing error in Call of Duty: Black Ops 3 Method 2: Restore from Antivirus Quarantine If Method

, you generally need to restore the file from quarantine or verify your game files through Steam. Antivirus software often flags this specific DLL as a threat and removes it automatically. Top Solutions How To Fix steam_api64.dll Missing From Games - 2025

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Method 2: Restore from Antivirus Quarantine

If Method 1 fails, your antivirus probably deleted the file the moment Steam downloaded it again. You need to restore it and create an exception.

For Windows Defender (Built-in):

1. Open Windows Security (search for it in the Start Menu).
2. Go to Virus & threat protection.
3. Click Protection history.
4. Look for a threat related to "steamapi64.dll" or "BlackOps3.exe".
5. Click the dropdown arrow and select Restore.
6. Next, go back to Virus & threat protection → Manage settings → Add or remove exclusions.
7. Add an exclusion for the entire Black Ops 3 folder (default: C:\Program Files (x86)\Steam\steamapps\common\Call of Duty Black Ops III).

For Third-party AV (Norton, McAfee, Avast): Open Windows Security (search for it in the Start Menu)

• Open your AV dashboard → Quarantine/History → Restore the file.
• Then add the Black Ops 3 game folder to the AV’s exception/exclusion list.

Once restored and excluded, repeat Method 1 (Verify Integrity) to ensure the file is intact.

✅ What the fix does:

This error usually happens because:

1. Your antivirus (especially Avast, AVG, or Windows Defender) quarantined the file as a false positive.
2. The file was deleted or corrupted.

The verified fix is:

• Step 1: Restore the file from antivirus quarantine.
• Step 2: If not there, re-verify game files via Steam (Library → Right-click BO3 → Properties → Installed Files → Verify integrity of game files).
• Step 3: If still missing, download the DLL from a trusted source (e.g., Steam’s own _CommonRedist folder or a friend’s legit copy) – never from random DLL download sites.

✅ Fix 2: Disable or Exclude Antivirus Temporarily

Many antiviruses (especially Avast, AVG, McAfee, and Windows Defender) falsely flag steam_api64.dll as a threat and quarantine it.

Steps:

1. Open your antivirus → Quarantine/Protected items.
2. Restore steam_api64.dll if found.
3. Add the entire Black Ops 3 folder to the antivirus exclusion list:
   • Default path:
     C:\Program Files (x86)\Steam\steamapps\common\Call of Duty Black Ops III
4. Re-verify game files (Fix 1) to be safe.

✅ Why this works: The DLL is a legitimate Steam file, not malware.

Method 3: Run Steam as Administrator

Sometimes, Windows permissions prevent the game from reading the DLL file correctly, leading the game to believe it is missing.

1. Close Steam completely (ensure it isn't running in the system tray).
2. Right-click the Steam shortcut on your desktop or start menu.
3. Select Run as administrator.
4. Launch Black Ops 3 from within the Steam client.

✅ Proven safe method:

1. Turn off real-time protection temporarily.
2. Verify game files in Steam (this redownloads the missing DLL).
3. Add the entire BO3 folder to antivirus exclusions.
4. Re-enable protection.