What is “APC Index Mismatch Windows 10” And How To Fix It

One of the most terrifying Windows issues is the BSoD (blue screen of death), which can occur for a variety of reasons. APC Index Mismatch, represented by the apc index mismatch windows 10 error code, is one type of BSoD fault that has been showing up more frequently as of late.

Suddenly, and for no apparent reason, your computer will freeze and display the dreaded blue screen of death, leaving you helpless in the face of total data loss. There’s a chance you could lose some data, and the underlying problem that caused the error could manifest itself in other ways.

What is an APC Index Mismatch?

When certain conditions are met, the main program will call a subroutine, or “asynchronous procedure call” (abbreviated APC). Whenever something goes wrong with your PC, the blue screen of death will often indicate an APC Index Mismatch as the root problem.

It’s common for a program to encounter the APC Index Mismatch issue if there’s a discrepancy between the number of processes entering and leaving the region of operations.

The outcome is a Blue Screen of Death on your computer. That message is the OS’s way of telling you that running this program could cause irreparable harm to the computer.

How to Fix APC Index Mismatch Windows 10

Envision yourself working on a computer to complete a task, such as producing an important document, with only a few minutes left before the deadline.

But all of a sudden, you get a blue screen with the error message “APC index mismatch windows 10.” When this message shows on Windows 10, there are a few things you may do to remedy it.

Method 1: Disable Realtek HD Audio Manager from Startup Items

Realtek HD Audio Manager has been linked by some users to the Blue Screen of Death (BSOD) APC Index Mismatch issue. To see if this solves the problem, you may try deleting Realtek HD Audio Manager from the list of Startup programs.

Step 1: To access Task Manager, press Ctrl + Shift + Esc.

Step 2: In order to launch Realtek HD Audio Manager, head to the Startup menu.

Step 3: To disable it, right-click on it.

Step 4: Exit Task Manager and restart your computer now.

Method 2: Run an SFC Scan

Step 1: To open Command Prompt and Run it as administrator, type cmd into the Windows search bar.

Step 2: Copy and paste DISM.exe /Online /Cleanup-image /Restorehealth into the search bar.

Step 3: Into the window labeled “Command Prompt” and pressing the Enter key.

Step 4: Let it complete and see if any damaged or corrupted files show up in the system.

Step 5: Then hit Enter after typing SFC/Scannow.

Step 6: Hold off until the task is completed. Close the window and restart the computer to see if the problem has been resolved.

Method 3: Uninstall problematic Windows update

Step 1: Simply press the Windows key plus I to open the Settings menu, and then click on Update & Security.

Step 2: After that, uninstall the updates by going to Windows Update, then clicking on the Update History tab.

Step 3: Locate the Windows update that was installed not too long ago that appears to be the root of the problem.

Step 4: Uninstall the update by right-clicking on it.

Method 4: Update to the latest release of Windows 10

The root cause of the APC Index Mismatch blue screen error may be resolved by installing the latest operating system update. See if the crash still occurs after upgrading to the most recent version of Windows 10.

Step 1: To access the Start menu, click the Windows logo in the bottom left of the screen.

Step 2: Select Preferences or press the Windows key plus I to access the settings menu.

Step 3: Select the tile labeled “Update & Security.” Your Windows Update preferences, including how often and at what times you’ll be notified of new versions, can be adjusted here.

Step 4: Keep using the normal Windows Update window. Selecting the Check for updates button will cause Windows 10 to look for any updates that may be missing.

Step 5: To see and apply any updates that have been flagged as available, select the View all optional updates link.

Step 6: If an update is available, selecting it and clicking “Install” will start the Windows 10 update process.

Method 5: Using the Base Windows Audio Driver

If you think the problem stems from your audio driver, there’s one more fix that has worked for many people in your circumstance.

It has been determined that using the Audiodg.exe file causes a Blue Screen of Death crash on specific laptop models due to an APC Index Mismatch.

Step 1: To bring up the Run dialog, use the Windows key plus R. Next, hit Enter after typing “devmgmt.msc” to launch the computer’s Device Manager.

Step 2: To access the Sound, video, and gaming controllers submenu, you’ll need to scroll to the very bottom of Device Manager.

Step 3: To remove Realtek High Definition Audio, right-click it and select “Uninstall Device.”
To launch a new Run box, close Device Manager and use the Windows key plus R.

Step 4: Then, press Enter after typing “appwiz.cpl” to launch the program’s settings panel.

Step 5: Navigate to Realtek High Definition Audio Driver in Programs and Features.

Step 6: When you do, select “Uninstall” from the menu that appears. The Realtek driver can then be uninstalled by following the on-screen instructions.

Step 7: If you want Windows to use its default audio driver instead of the Realtek driver after you uninstall it, you’ll need to restart the machine thereafter.

Step 8: Check the Sound, video, and game controller section of Device management at next boot to determine if the Windows audio base driver is there.

Step 9: Once the Windows audio base driver has been verified to be installed, you should keep an eye on your system to see if the APC Index Mismatch BSOD continues to appear.

Conclusion

A BSOD, or Blue Screen of Death, occurs when Windows has a catastrophic malfunction and must restart. BSODs can occur for a variety of reasons, including faulty code, hardware failure, incomplete or damaged files, or malicious software.

Blue screens of death (BSODs) can appear at any time and are notoriously challenging to troubleshoot due to their obscure error messages, such as “apc index mismatch windows 10,” that are beyond the comprehension of the average computer user.

An APC Index Mismatch Blue Screen of Death is just as bad, but it typically indicates driver or hardware trouble.