8 Solutions to Resolve Stop Code APC Index Mismatch

David Darlington

Jan 15, 2024 • Filed to: Windows Computer Solutions • Proven solutions

Just like any BSOD error, stop code APC index mismatch forces your computer to crash every time it starts-up. Also known as Asynchronous Procedure Call, it's a function designed to run outside the main program when some specific conditions are met. It indicates an inconsistency in the total number of processes entering as compared to leaving the area of operations where the program runs. The error also implies that no software could run without the risk of damaging the system. Hence, you see a blue screen of death error that halts the system.

The article showcases some of the best ways to fix stop code APC index mismatch. It also features an efficient way to recover any unsaved data if it happens in the middle of any important task.

Part 1: What is error APC INDEX MISMATCH?

Stop code APC index mismatch is another BSOD error that happens because of numerous reasons. As seen in many cases, system drivers, hardware glitch, and third-party applications often lead to the error. While some have witnessed the error using their webcam on Skype, others have reported it while playing video games.

Irrespective of the reason leading to the error, you might be able to fix the problem if you knew its various aspects. Now, based on the cause leading to Stop code APC index mismatch, numerous solutions can be used to fix the issue. But even with all the solutions, you won’t be able to implement them on your system because of BSOD error. You won’t be able to go past the blue screen, no matter how many times you restart your system.

Then how can you possibly fix the issue? Well, one possible way is to run your computer in safe mode. To begin your computer in safe mode, restart the system and press the 'F8' key at 1-sec interval to open Windows Recovery Environment (WinRE). Once it opens, select 'Safe mode with networking.'

And if you couldn’t access WinRE on your laptop, you can use an external monitor. Connect your laptop and external monitor using HDMI cables and follow the process mentioned above.

Now, here are some of the effective solutions you can use to get rid of the error.

Solution 1: Install Latest Updates

There is a high possibility that the current version of your Windows is not compatible with a hardware device or any particular software application. If that’s what the case is, stop code APC index mismatch can be solved by installing the latest Windows updates. Moreover, a bug might be causing the BSOD error. Now, follow the steps mentioned below to check for the update manually.

Step 1: Click on Windows + I keys at the same time to open ‘Settings.’

Step 2: Now, tap on the ‘Updates & Settings’ tab in the Settings.

Step 3: Now, Click on ‘Check for Updates.’

Once you click on it, Windows will scan for available updates. Once Windows finds the update, it automatically gets downloaded in the background. Make sure you restart your computer to make changes once it is done.

Solution 2: Check System Files with the System File Checker

All modern Windows OS is equipped with System File Checker (sfc/scannow). If the stop code APC index mismatch error is occurring as a result of damaged or corrupted system files, it works best to repair them. Now, follow the steps mentioned below to check your system files.

Step 1: Firstly, tap on Windows + R keys to open the jump list.

Step 2: Now, select 'Command Prompt' as admin.

Step 3: Write 'sfc/scannow’ in the command prompt and tap on ‘Enter.’

The above command will repair any damaged and corrupted files. Restart your computer to check if the BSOD error persists. If it does, try the next solution.

Solution 3: Uninstall the DisplayLink driver

For those who faced stopping code APC index mismatch, many reported that the BSOD issue got solved once they uninstalled the Display Link Drivers. If you are using an extra monitor for maximum productivity, DisplayLink works wonder. But sometimes it also leads to lots of incompatibility issues. Here are the steps to uninstall the driver.

Step 1: Click on Windows and R keys simultaneously to open the 'Run' dialogue box.

Step 2: In the dialogue box, write ‘appwiz.cpl’ and press ‘Enter.’ It will open ‘Programs and Features.’

Step 3: Scroll down in the list of applications and find ‘DisplayLink’ Core software.

Step 4: Right-click on the tab and select ‘Uninstall.’

Once the uninstallation is done, restart your computer to take effect. If this doesn't solve the stop code APC index mismatch error, something else might be causing the issue.

Solution 4: Change your RAM frequency

As briefly mentioned earlier, the stop code APC index mismatch could also be occurring as a result of a malfunctioned hardware device. Sometimes, due to the instability caused by the overclocking in the hardware components give rise to the error. Overclocking is a process when the processor of your computer runs at a higher speed than intended by its maker.

Now, you can set the CPU and GPU RAM frequencies to the default frequencies to check if the BSOD error is solved or not. If you feel that enforcing the RAM frequencies doesn't necessarily lead to system crashing, you can gradually raise the frequencies. Make sure that you don’t touch the previous threshold limits.

Solution 5: Disable Virtualization in BIOS

The virtualization feature of your Windows operating system could be leading to stop code APC index mismatch error. Some people have reported the BSOD error while using the Trend Micro tool on their computer. Often the Virtualization feature interferes with the tool that leads to the problem to appear. Here’s how you can solve the issue.

Step 1: Restart your computer and tap on F2 during the boot to open BIOS settings.

Step 2: After entering BIOS settings, you need to locate the Virtualization feature and disable it.

Once you disable the feature, restart your computer and check if the problem is solved or not. If the BIOS settings don’t have the Virtualization feature, you can skip this step.

Solution 6: Update the Driver or Reinstall the Driver

Reinstall

Reinstalling the Intel Graphic Driver might solve stop code APC index mismatch error if it’s occurring from the current version of the driver. To reinstall the graphic driver, you have to install it uninstall it first. Follow the process to know how to do so.

Step 1: Click on Windows and X simultaneously to select the device manager from the list.

Step 2: Click on the 'Disk drives' option to expand it and right-click on the driver option to uninstall the device.

Step 3: Go to the Intel support website and click on the 'Intel Driver and Support Assistant Installer option.' Make sure that your display adapter belongs to the Intel Graphics Adapter family.

Step 4: Tap on the buttons to accept the Intel terms and conditions.

Step 5: Now, double-tap on the .exe installer.

Step 6: Check the license agreement, click on the install tab, and restart your computer.

Step 7: In the taskbar, you will get an IDSA tool icon. Right-click on the icon and ‘Check for new drivers’ to complete the process.

Now, the assistant will check your device for a compatible Intel Graphics adapter. Download and install the latest drivers automatically.

Update

Sometimes, updating the drivers is also an effective option to solve stop code APC index mismatch error. Follow the steps below to know-how.

Step 1: Click on Windows and X at the same time to choose the device manager from the list.

Step 2: Click on the 'Disk drives' option to expand it and right-click on the driver option to uninstall the device.

Step 3: Now, tap on the ‘Search Automatically for Updated Driver Software’ tab.

It will search for the latest updates for the drivers and installs them automatically.

Solution 7: Disable the Realtek HD Audio Manager

If your system is running an application that isn’t necessarily needed, it might be causing BSOD error. Among many applications, Realtek Audio Manager constantly runs in the background that needs to be disabled from Task Manager. Here’s how you can disable it from running from causing the error.

Step 1: Tap on Ctrl, Shift, Escape keys at the same time to open ‘Task Manager.’

Step 2: Once you open the Task Manager, open the ‘Startup’ option.

Step 3: You will locate the Realtek Audio Manager, among many other Startup apps. Right-click on the option and select 'Disable.'

If you don’t find Realtek HD Audio Manager on the list, disable all the applications in the Task Manager.

Solution 8: Reinstall or Reset Windows

If your Windows is not working as up to the mark and facing system errors like stop code APC index mismatch, you can try to reset Windows. Now, the following steps will let you know how to do so.

Step 1: Go to the 'Start' option and tap on 'Settings.'

Step 2: Tap on ‘Update & Security’ and click on the ‘Recovery’ option on the left panel.

Step 3: Click on ‘Reset this PC’ and select ‘Keep my files’ on the following option.

Step 4: Tap on Next -> Reset -> Continue.

After these steps, it might take some time to reset Windows 10. Once it is done, restart the computer and check if it solves the BSOD error.

Part 2: How to Recover Unsaved Data after APC Index Mismatch Error Happens?

Even though the article features numerous ways to solve the stop code APC index mismatch, there is a high possibility of a loss of unsaved data. Although you can find multiple ways to recover lost data, Recoverit Data Recovery software is among the best in retrieving different types of data files. Whether it's audio, video, or word document, you can recover them all.

Now, to retrieve the lost data, you must first download the application and launch it on your system. Double-click on the Recoverit logo and follow the steps below.

Step 1: Select a Location

To find the unsaved or lost data, you need to choose the location from where you lost your files under the 'Select Location' option. Now, click on the 'Start' tab to initiate the process.

Also, if you know the exact location of the lost data, you can ‘Select Folder’ in the ‘Select Location’ tab.

Step 2: Scan the location

As soon as you click on the 'Start' tab, Recoverit initiates the thorough scan. Now, if you see your lost data files, you can pause or stop the process any time in between.

Step 3: Preview and Recover

Recoverit allows you to get a preview of all the files that feature the file size, type, date modified, and more. When you are assured of the files that you wanted, you can simply click on the 'Recover' button.

It would be best if you save the data files at a different location. Now, tap on ‘Save’ to store it at a different storage location.

The Bottom Line

If you are judging the stop code APC index mismatch error by the restrictions it creates, you might be overrating the issue. The article features eight effective solutions that cover different root cause of the problem. If you happen to lose any unsaved data, Recoverit Data Recovery works best to recover any data with ease.