How to Fix Apc Index Mismatch BSOD on Windows 11/10

The apc_index_mismatch BSOD error occurs due to outdated and faulty drivers. Incompatible hardware can also result in the apc index mismatch error. The annoying part about this error is that it results in blue screen of death errors, popularly known as BSOD errors. The chances of a system crash are above 95% when a BSOD error occurs. If you are troubled by the apc_index_mismatch error, check out the solutions given below to resolve the issue as soon as possible!

The APC index mismatch error message contains vital information regarding the culprit and cause of the error. By analyzing the error message, you can find out the exact file or program that caused the error. BSOD errors are one of the most troublesome errors that you can encounter. Follow the solutions given in this article to resolve the BSOD error on Windows 10 and Windows 11.

Causes of APC Index Mismatch Error

The APC index mismatch error usually occurs due to outdated or corrupt drivers. Incompatible and broken hardware devices can also cause this error. Experts have attributed Realtek and Nvidia drivers as the culprit causing apc_index_mismatch error on various computer-related forums.

To fix this issue, you need to identify and remove/disable the driver responsible for causing the error. In this article, you will find a list of solutions that will help you get rid of this error. Try the solutions one by one until the apc_index_mismatch BSOD error gets fixed.

Solutions to Fix APC Index Mismatch BSOD on Windows 10 & 11

1. Use System File Checker(SFC) Tool

Windows 10 and Windows 11 come with built-in utility tools that help you troubleshoot operating system issues. The System File Checker tool and Deployment Image Servicing and Management are utility tools that help resolve issues by scanning and repairing system files.

Here’s how you can fix apc_index_mismatch error on Windows using SFC:

1. 1. To use the SFC and DISM tool, we require a PowerShell instance with admin privileges.
   2. Launch a PowerShell window by right-clicking on the Start menu. Select Windows PowerShell (Admin) from the pop-up menu.
   3. Once a PowerShell window is spawned, type the following command and press Enter key: DISM /online/cleanup-image/restorehealth
   4. Follow the on-screen instructions and wait for the tool to complete its scan.
   5. Next, type the following command and press the Enter key: sfc /scannow
   6. The System File Checker (SFC) tool will repair the corrupted and missing system files. Wait a few minutes and allow the process to complete.
   7. Re-start your computer.

After restarting your computer, check whether the apc index mismatch error still occurs.

2. Install Latest Windows Update

Microsoft has acknowledged the APC index mismatch error. The developers have started rolling out updates to fix bugs resulting in the apc index mismatch BSOD on Windows 10 and Windows 11. The easiest way to fix this issue is by simply updating your Windows OS to the latest version.

1. Open Windows Settings.
2. Now go to the Update & Security section.
3. In the Windows Update tab, look for the Check for updates button.
4. Click on the Check for updates button to download and install the latest Windows updates.

After installing the latest Windows update, verify whether the issue has been fixed. In case, the Windows update didn’t fix the issue, check out the solutions given below.

3. Disable Realtek HD Audio Manager

In most apc_index_mismatch error messages, the cause has been attributed to Realtek drivers. Hence, it is highly recommended that you disable the Realtek HD Audio Manager to resolve the BSOD issue. Here’s how you can do that:

1. Launch the Task Manager by simultaneously pressing the Ctrl + Alt + Del keys on your keyboard.
2. Navigate to the Startup tab to find a list of startup applications.
3. Search for Realtek HD Audio Manager in the list.
4. Right-click on the application name and select Disable from the menu.

And that’s it! In a few simple steps, you have successfully disabled Realtek HD Audio Manager that is likely to be the culprit of the apc_index_mismatch issue.

4. Disable Virtualization in BIOS

Windows 11 is a newly launched OS that is still in the development phase. It has lots of constraints and requirements to function properly on Desktop computers. Virtualization is one of the features that causes the operating system to malfunction, thereby resulting in the APC Index Mismatch BSOD.

Here’s an easy method to fix this issue:

1. Enter the BIOS menu by pressing the F2 or Delete key while booting up your computer.
2. Navigate to the system settings and disable Virtualization.
3. To locate this feature on your motherboard BIOS settings, you might want to check your manufacturer’s website or manual.

5. Check Your Drivers

As we’ve previously mentioned, faulty/outdated/missing drivers can result in the apc index mismatch BSOD on Windows 10 and Windows 11. The simplest way to resolve this is to disable the driver that’s causing the error. Here’s how you can do that:

1. In the Windows Search box, type Device Manager and hit the Enter key.
2. In the Device Manager, look for newly installed drivers. Also, look out for drivers with a yellow exclamation mark next to them. The yellow exclamation mark signifies that the driver is running an outdated version.
3. Right-click on the device and select Update driver.
4. To install the drivers automatically, select Search automatically for drivers option.
5. If you have downloaded and saved the drivers on your computer, select the Browse my computer for drivers option.

Once you have disabled and updated the faulty drivers, the apc_index_mismatch issue will cease to exist.

BSOD errors are extremely annoying as they always result in a system crash. If you have been plagued by apc_index_mismatch BSOD error, you are in the right place. We hope you are able to resolve the issue on your end by applying one of the solutions mentioned above.