FIXED: Armored Core 6 Application Error 0xc0000005

This guide will help you get rid of Armored Core VI: Fires of Rubicon Application Error 0xc0000005 by increasing virtual memory, installing essential C++ redistributable, etc..

The Armored Core VI: Fires of Rubicon Application Error 0xc0000005 is an error that prevents Armored Core VI from even starting. This error often occurs because the game is trying to access a portion of memory that it was not allowed to access. It leads to a violation of access and makes the game crash.

The exact reason for this error has not been found yet, but there can be multiple reasons, ranging from insufficient hardware to low virtual memory and faulty RAM modules, for this error to occur.

The AC6 Application Error 0xc0000005 reads, “armoredcore6.exe – Application Error; The application was unable to start correctly (0xc0000005). Click OK to close the application.
Armored Core VI: Fires of Rubicon Application Error 0xc0000005. (image copyrighted by eXputer)
Armored Core VI: Fires of Rubicon Application Error 0xc0000005. (image copyrighted by eXputer)
Key Takeaways

Here are some solutions to fix Armored Core 6 Application Error 0xc0000005:

  1. Check the System Requirements.
  2. Allow access through Windows Defender.
  3. Verify your Game files.
  4. Download and Install Essential C++ Redistributables.
  5. Disable Overlays.
  6. Disable Overclocking.
  7. Increase your Virtual Memory.
  8. Update your Graphics Drivers.
  9. Check and clean your RAM Modules.
Before starting the guide, make sure your drivers are up to date and you have the latest version of Windows.

Armored Core 6 System Requirements

Before we jump into the guide, your system specs must meet the system requirements of the Armored Core VI. If your PC doesn’t meet the necessary requirements, it can lead to errors like these.

Armored Core 6 System Requirements. (image taken by eXputer)
Armored Core 6 System Requirements. (image taken by eXputer)

Compare these official requirements for AC6 above with your system specifications. If your hardware is falling short of meeting even the minimum requirements, then the error is originating from your PC’s lack of required hardware.

Verify Game Files

Sometimes, your game files can get corrupted or deleted due to your antivirus software or any cleaning tools. Therefore, verifying game files can help you fix corrupted or deleted game files that potentially cause your copy of the Armored Core VI to crash. Steam can verify the faulty or missing files of the game and automatically fix them.

When I usually encounter freezing and stuttering in games, the issue turns out to be something wrong with the game files. Luckily, verifying the game files will always do the trick for you.

You can check out our complete guide on How To Verify Game Files On PC [All Game Clients] by me.

Downloading And Installing Essential C++ Redistributables

Some games and applications that are developed using Visual Studio C++ require certain runtime libraries to run smoothly. Therefore, every gamer and user needs to download and install all the essential C++ redistributables so that there is no chance of any error related to C++ runtime libraries.

Download and install from the official Microsoft Redistributables page. However, you can also download an AIO setup from any third-party website that will automatically install all the required redistributables.

I recommend that you install all the required redistributable (both x64 and x86) only from Microsoft’s official website to avoid any chances of malware entering your PC.

Disable 3rd-Party Overlays

Overlays provide a number of useful features during gameplay, such as screen recording, instant replay, fps counter, etc. However, they can also be a reason for problems such as Armored Core VI: Fires of Rubicon application error 0xc0000005.

In addition to the problem at hand, these overlays are known to cause stuttering, lag, and crashes in other games, too. This is actually confirmed by several players who’ve encountered game crashes with Steam Overlay. Therefore, I recommend turning off Steam, as well as any other overlays you might have enabled.

Disable Overclocking

Overclocking your CPU or GPU can give you a certain boost in some situations. Still, it can cause much more disaster because it can cause your graphics card to consume more voltage. This results in overheating, making the card exceed its heat limit and causing its components to get damaged and become unstable.

Moreover, overclocking a graphics card voids the warranty of the card provided by its manufacturing company or the supplier. Therefore, keeping these circumstances in mind, it is recommended not to overclock your graphics card and keep the clock speed at a stable limit.

Follow these steps to disable Overclocking:

For Nvidia

  1. Press the Alt+Z keys, and the Nvidia Geforce Experience overlay will appear.
  2. Click the Performance button on the top left, and the Performance Options tab will appear.
  3. Then click the reset button to restore default settings, which will disable any applied overclocking.


  1. Open the AMD software and go to the performance settings section>tuning section>enable the manual control.
  2. Now, you can change the tunings according to your requirements, but it is recommended to keep them underclocked to disable overclocking.

MSI Afterburner

  1. Using MSI Afterburner to disable overclocking is very easy; just open the MSI Afterburner application.
  2. Now, in the sliders, just slide down your core clock and memory clock sliders, and you’re good to go.
    Tuning MSI Afterburner. (image taken by eXputer)
    Tuning MSI Afterburner. (image taken by eXputer)

Increase Your Virtual Memory

Virtual Memory is basically a reserved space on your HDD or SSD that acts as RAM when some other process or processes completely utilize your system’s physical RAM. \

Therefore, it can be beneficial to increase your virtual memory to a reasonable amount to eliminate errors such as Armored Core VI: Fires of Rubicon Application Error 0xc0000005 while not using a large amount of precious space as memory.

Here are the steps to increase your virtual memory:

  1. Open This PC>Right-click anywhere>Properties>Advanced System Settings in the left section.
  2. Now, click the Settings… button under Performance to open Performance options.
  3. Open the Advanced tab>Change… under Virtual Memory.
  4. Uncheck the Automatically manage paging file size for all drives check box.
  5. Finally, select any drive, enter the Initial and Maximum sizes after enabling the Custom size option, and click Set to apply.
    Changing the Virtual Memory Size in Virtual Memory Settings. (image copyrighted by eXputer)
    Changing the Virtual Memory Size in Virtual Memory Settings. (image copyrighted by eXputer

Access through Windows Defender

Windows Defender can sometimes cause issues with certain applications and games, detecting some of their files as malware and deleting them.

Therefore, to prevent the Windows Defender from deleting any Armored Core VI files, you must add it to the exception list of Windows Defender. Doing this has benefitted a lot of players in the community as well.

Learn How To Whitelist the Game Directory In Antivirus/Defender with our expert guide.

Final Words

Application Error 0xc0000005 in AC6 is an uncommon error that was more prominent in the early release days of the game. However, it’s been relatively fixed for several players, but some players may still encounter it.

By following the above methods, your issue will definitely be fixed. However, if the error still persists, try cleaning or changing your RAM modules, as they might be the last culprit behind AC6 Application Error 0xc0000005.


Why does Armored Core VI: Fires of Rubicon Application Error 0xc0000005 occur?

The exact reason for this error is not yet found, as the game has just been released. However, errors like these occur when the game tries to access a portion of memory that it wasn’t allowed to.

How can I fix Armored Core VI: Fires of Rubicon Application Error 0xc0000005?

You can fix the Armored Core VI: Fires of Rubicon Application Error 0xc0000005 by Installing essential C++ redistributables and increasing your system’s virtual memory.

Check out more content on Armored Core 6 from eXputer: 

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Haider Khan is our error guides writer who loves to tinker around with operating systems and game files to find practical solutions to video game issues. He then crafts easy-to-follow error fix guides based on his findings. He’s also a Battlefield veteran who likes to rack up some Ws in his spare time. Learn some more about his gaming journey on his Steam profile. Experience: 3+ Years || Education: Bachelor's in Journalism || Successfully Troubleshot Over 200 Games || Mainly Covers Error Fix & Game Settings 

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