The error message "The additional DLL couldn't be loaded" in Call of Duty: Black Ops III
is typically caused by Windows Defender or other antivirus software incorrectly flagging and quarantining game files during installation or after an update. Primary Fix: Restore Quarantined Files
The most common solution reported by players on Reddit is to restore the specific file (often SLF64.dll or similar) that was blocked: Open Windows Security (Windows Defender). Navigate to Virus & threat protection > Protection history.
Locate the most recent "Threat blocked" or "Threat quarantined" entry related to the Black Ops III installation folder. Select the item and click Actions > Restore.
To prevent it from happening again, add the Black Ops III game folder as an Exclusion in your antivirus settings. Secondary Troubleshooting Steps
If restoring the file doesn't work, try these common technical fixes:
Verify Integrity of Game Files: If you are using Steam, right-click the game in your library, go to Properties > Installed Files, and select Verify integrity of game files. This will detect and redownload any missing or corrupted DLLs.
Install Media Feature Pack: This error often occurs on Windows N or KN versions because they lack the necessary media components. Players recommend downloading the Media Feature Pack directly from Microsoft.
Run as Administrator: Right-click the game's executable (blackops3.exe) in the installation folder and select Run as Administrator to ensure it has the permissions needed to load all resources.
Update Graphics Drivers: Ensure your GPU drivers are current, as outdated software can lead to DLL loading failures.
System File Checker: Open Command Prompt as an administrator and run sfc /scannow to repair any underlying Windows system file issues.
Did this error appear immediately after an update, or is this your first time installing the game? BO3 Problem additional dll couldn't be loaded : r/blackops3
If you are encountering the error message "The additional DLL could not be loaded" while trying to launch Call of Duty: Black Ops 3
, you are likely facing a common conflict between the game's security/bypass files and your system's antivirus software.
This specific error frequently occurs because Windows Defender or third-party antivirus programs mistakenly flag critical game files—specifically
or similar library files—as malicious and quarantine or delete them during installation or startup. Primary Causes of the DLL Error The error message "The additional DLL couldn't be
The error is rarely a sign of a "broken" game and is almost always a result of system-level interference: Antivirus False Positives
: Windows Defender often identifies the game’s custom DLLs (especially in modified or repacked versions) as "Trojan" threats and removes them automatically. Missing Dependencies : The game may lack necessary redistributable packages like Visual C++ 2010 components Incomplete Installation
: If the installation process was interrupted by low RAM or background software, certain DLL files may never have been properly extracted. Top Solutions to Fix the Error Check Antivirus Quarantine
The most effective fix is to restore the file from your protection history. Windows Security Virus & threat protection Protection history
Look for a recently blocked item related to the BO3 folder (often a file like Select the file and choose : Add the entire Black Ops 3 game folder to your antivirus Exclusions list to prevent this from happening again. Verify Game Integrity (Steam Users)
If you are playing through Steam, use the built-in repair tool: Right-click the game in your Steam Library and select Properties Navigate to the Installed Files Verify integrity of game files
. Steam will automatically detect and redownload any missing or corrupted DLLs. Install Required Redistributables
The game requires specific legacy drivers to run properly. Ensure you have the following installed: DirectX End-User Runtime Microsoft Visual C++ 2010 Redistributable (x64) Run as Administrator
Permissions can sometimes block the game from "calling" additional DLLs. Right-click the BlackOps3.exe file in your installation directory. Properties Compatibility Check the box for Run this program as an administrator Disable Overlays and Background Tools
Software that "hooks" into the game can conflict with DLL loading. Disable apps like BitDefender , or high-performance overlays before launching.
While I can certainly write a deep review of Call of Duty: Black Ops III
, the "additional DLL could not be loaded" error you’re seeing often points to a specific technical hurdle—most commonly related to antivirus software or missing system files.
Here is a look at the game's enduring legacy followed by how to fix that pesky error. Deep Review: The High-Water Mark of the Jetpack Era
Call of Duty: Black Ops III (BO3) remains one of the most content-rich entries in the franchise, celebrated primarily for its unparalleled Zombies mode and its refined take on "advanced movement."
Zombies: The Undisputed King: For many, BO3 is the definitive Zombies experience. With the introduction of the Zombies Chronicles DLC, which remastered classic maps, and a deep modding community through the Steam Workshop, the replayability is nearly infinite. The "GobbleGum" mechanic added a layer of strategy (and occasional frustration) that fundamentally changed how players approached high-round runs. “The additional DLL could not be loaded
Multiplayer & Movement: Coming after Advanced Warfare, BO3 perfected the "momentum-based" movement system. The wall-running and power-sliding felt fluid rather than jerky, allowing for verticality without losing the core "boots on the ground" gunplay feel. The "Specialist" system—giving players unique abilities like the "Gravity Spikes"—added a hero-shooter element that was polarizing but undeniably influential.
The Campaign’s Identity Crisis: The campaign is often cited as the game's weakest link. While technically impressive with its four-player co-op support, the mind-bending, "Inception-style" narrative felt disconnected from the gritty political intrigue of the first two Black Ops titles.
Legacy on PC: In 2026, the game is more alive on PC than most its age, thanks to community patches like the T7 Patch which fix security vulnerabilities and performance issues. How to Fix: "The Additional DLL Could Not Be Loaded"
This error typically occurs because your antivirus (often Windows Defender) has mistakenly quarantined a vital game file, such as SLF64.dll or additional.dll. 1. Restore Files from Antivirus Quarantine Open Windows Security > Virus & threat protection. Select Protection history.
Look for recently blocked files related to Black Ops 3. If you see an entry for a DLL file, select it and choose Restore.
Pro Tip: Add the game’s installation folder to your antivirus Exclusion list to prevent it from happening again.
2. Verify Game Files (Steam)If you are playing on Steam, the easiest fix is to let the launcher find what's missing: Right-click Black Ops III in your library. Go to Properties > Installed Files.
Click Verify integrity of game files. This will automatically re-download any missing or corrupted DLLs.
3. Update Visual C++ RedistributablesDLL errors are often caused by outdated system libraries.
Download and install the latest Microsoft Visual C++ Redistributable packages (specifically the 2015-2022 x64 versions) from the Official Microsoft Support site.
4. Run as AdministratorSometimes the game fails to load DLLs because it doesn't have permission to access the folder. BO3 Problem additional dll couldn't be loaded : r/blackops3
The error message "The additional DLL could not be loaded" in Call of Duty: Black Ops III
is most frequently caused by antivirus software (such as Windows Defender) incorrectly identifying game files as threats and deleting or quarantining them. Most Effective Fixes Restore Quarantined Files:
Open Windows Security and navigate to Virus & threat protection.
Go to Protection history and look for files related to Black Ops III (often named SLF64.dll or similar). Select the file and choose Restore. Set Antivirus Exclusions: This error typically prevents the game from starting
To prevent the file from being deleted again, add the Black Ops III installation folder as an Exclusion in your antivirus settings. Verify Game Files (Steam):
Right-click Call of Duty: Black Ops III in your Steam Library.
Select Properties > Installed Files and click Verify integrity of game files. This will redownload any missing or corrupted DLLs. Install Media Feature Pack:
Users on "N" or "KN" versions of Windows often encounter DLL errors because they lack necessary media components. Download and install the Media Feature Pack for your specific Windows version from the Microsoft website. Additional Troubleshooting
Downpatching: A recent Steam update has been known to break certain mods (like the T7 patch). You may need to "downpatch" your game to a previous version's .exe through the Steam console using the download_Depot command.
Update Drivers & Runtimes: Ensure you have the latest Nvidia drivers or AMD drivers, and reinstall DirectX and Microsoft Visual C++ Redistributables.
Run as Administrator: Right-click the game’s executable file and select Run as administrator. BO3 Problem additional dll couldn't be loaded : r/blackops3
This error message ("The additional DLL could not be loaded") usually indicates a problem with the game's installation, specifically regarding the Treyarch DLC DLL files or corrupted game files.
Here are the top methods to fix this issue, ranked by effectiveness:
Verifying game files can resolve the issue if the required DLL files are corrupted or missing.
The most common cause of this error is a conflict or corruption within the Microsoft Visual C++ Redistributable packages.
Black Ops 3 is an older title (released in 2015) that relies on specific versions of C++ libraries to function. Modern Windows PCs often have newer versions installed, or—in the case of a fresh Windows install—the specific older versions the game demands are missing. When the game executable tries to call upon these libraries and fails, it defaults to the generic "DLL could not be loaded" message.
Players of Call of Duty: Black Ops 3 on PC may encounter a frustrating error when launching the game or certain modded/map content:
“The additional DLL could not be loaded.”
This error typically prevents the game from starting or crashes it shortly after loading. It is most common when using custom zombies maps, mods, or when certain system files are missing or blocked.
Updating graphics drivers is essential to ensure that the game runs smoothly. To update graphics drivers: