The most annoying of all errors Windows 10 are the errors BSOD (Blue Screen of Death) that causes all Windows processes to stop or sometimes crash.
APC (asynchronous procedure call) index mismatch is a blue screen error that causes your PC to reboot and Windows to crash with an error message containing the name of the culprit file, such as win32k.sys, vdmp.sys, wdf01000.sys, fltmgr.sys, and ntoskrnl.sys.
Solutions to fix an APC Index Mismatch BSOD
- Install the latest Windows update
- Check system files with SFC
- Update the driver or reinstall the driver
- Disable Realtek HD Audio Manager in the Boot
- Deploys a BSOD troubleshooter
- Uninstall Display Link Driver
- Change the frequency of your ram
- Disable virtualization in BIOS
- Check your hardware
- Delete interfering software
- Reinstall or reinstall Windows
Enter safe mode
Before you start with any of the fixes below, you need to log into Windows at safe mode. This will run the operating system with minimal device drivers and basic system tweaks. This will keep the APC Index Mismatch Blue Screen BSOD at bay for a while and allow you to move forward with the fixes.
Step 1. Shut down the system and restart it several times while it is on the Windows logo screen to enter the recovery window. Auto repair Windows Startup.
Step 2. Navigate to the problems section -> Advanced -> Startup setting.
Step 3.Push the button Restart and use the number or function keys to choose Enable Safe Mode with Networking. It is usually option 5, so press the key 5 or F5 to access it.
Step 4.Your Windows will now reboot into Safe Mode with Networking. You can follow the fixes below without risking your personal data.
Fix 1: Install the latest Windows update
Microsoft constantly releases updates for Windows 10 to fix known bugs and provide security fixes. The APC Index Mismatch BSOD error can occur if a Windows update has not been installed.
Step 1.Press the icon Windows and the key I simultaneously to open the application Settings.
Step 2. Navigate to the section Update and Security.
Step 3.In the Windows updates in the left panel, click the button Check for updates right.
Fix 2: Check system files with SFC
Windows 10 provides system utility tools called System File Checker (SFC) and Deployment Image Servicing and Management (DISM) to scan and repair system files to resolve any issues with the operating system.
Step 1.Press the icon Windows and the key X simultaneously and select Instruction of commands (admin) o Windows PowerShell (admin) on the menu.
DISM /online /cleanup-image /restorehealth at the command line to check for problems with the system image.
sfc /scannow at the command line to scan and repair system files.
Fix 3: Update the driver or reinstall the driver
Faulty or incompatible drivers are the most common cause of most computer errors. The APC mismatch error can also occur if your system drivers are not updated or compatible with your Windows version.
Drivers with a yellow exclamation mark are either not installed correctly or have compatibility issues.
Step 1.Press the icon Windows and the key X simultaneously and select Device administrator in the open menu.
Step 2.The Device Manager contains all categories of drivers currently available on your system. Scroll down and check all your drivers to locate the faulty driver, say Sound, video and game controllers.
Step 4.In the next window, choose Automatically check for updates in the pop-up window and allow the driver to get updates.
If the above process does not solve your problem, or if you know which driver is causing the problem, you can download third-party driver update software.
You can also choose to roll back the driver to fix the APC index mismatch. This will revert the current driver version to the version previously saved on your system.
Step 1.Press the icon Windows and the key X simultaneously and select Device administrator in the open menu.
Step 2.The Device Manager contains all categories of drivers currently available on your system. Scroll down to locate the problematic driver, say Sound, video and game controller.
Step 4. Go to the Driver tab and check if the option Recoil Controller is enabled. If it is, click on it, and it will roll back the driver version.
Step 6.Once the driver has rolled back, restart your computer and perform a bug check for the APC index mismatch fault.
Fix 4: Disable Realtek HD Audio Manager from boot
Sometimes, some startup applications affect the boot process and cause the APC Index Mismatch BSOD error.
Step 1.press simultaneously Ctrl + Shift + Esc to open the window Task Manager.
Step 2. Go to the tab Home from the Task Manager and locate Realtek HD Audio ManagerIf you can't find it, look through the list to identify any unnecessary programs that load at startup.
Step 3. Double click on the unnecessary startup programs and choose Deactivate.
Step 4.Close Task Manager and restart your computer and check for the blue screen error.
Fix 5: Deploy a BSOD Troubleshooter
The guide offers you many solutions, each of them targeting a specific reason for the APC index mismatch error. However, you can do all of these at once by using a BSOD troubleshooter.
BSOD errors can occur due to a variety of reasons, including driver issues, hardware problems, corrupted registries, and damaged DLLs.
You can address all of these variables in one place by using Restoro, which is a third-party BSOD troubleshooter. Restoro has a vast online database that can replace any item responsible for stopping the BSOD code.
Step 1. Go to Restoration and download and install the software following the on-screen instructions.
Step 2.Launch Restoro and wait for the software to identify the corrupt files and other stability issues.
Step 3.Press the button Start repair for the software to fix the BSOD error.
Step 4.Restart your computer and check if the APC Index Mismatch BSOD error is fixed.
Fix 6: Uninstall DisplayLink driver
If you use multiple displays connected to the same computer, you are probably familiar with the central DisplayLink software.
Sometimes the drivers for this software are not fully compatible with Windows and give an APC Index Mismatch Stop Code BSOD error.
Step 1.Press the icon key Windows and write the control Panel in the search box. Tap the option Control panel that appears in the results.
Step 2.In the upper right corner, in the drop-down list See for, choose Category.
Step 3.In the section programs, Click on Uninstall a program.
Step 5.Click on it and press the button uninstall from the top. Download the DisplayLink Installer Cleaner to completely uninstall the device.
Step 6. Restart your computer and check if the APC index mismatch error is resolved.
Fix 7: Change the frequency of your RAM
Changing the frequency of your RAM is an advanced solution and requires knowing what you want to do and what frequency you want to achieve.
If the frequency is not set correctly, it can cause the system to become unstable. It is essential that the motherboard can handle the frequency you set. So, before proceeding, remove all overclocking settings.
Overclocking the CPU, GPU, or RAM is not recommended as it may cause the system to crash. You can use the hit-and-miss method to increase or decrease the frequencies of the RAM, CPU, or GPU.
Fix 8: Disable virtualization in BIOS
Sometimes users enable virtualization in BIOS which may cause APC Index Mismatch BSOD error.
Step 1. Turn on your computer and press F2 during the boot sequence.
Step 2.In BIOS setup, navigate to the function VirtualizationYou can find it in the motherboard manual.
Step 3. Disable virtualization and Save and exit from the BIOS. Let your computer boot normally.
Fix 9: Check your hardware
Faulty hardware such as touchpad, mouse, keyboard, etc. can be a potential cause of the APC Index Mismatch BSOD error.
If you get the “APC Index Mismatch” BSOD after receiving a newly installed device, you may need to replace it as it is not compatible with your computer.
Fix 10: Remove interfering software
Programs such as antivirus (Norton o Avast), LogMeIn, etc., can interfere with your operating system and cause APC index mismatch errors.
You should remove these programs with a good uninstaller, along with all their associated files.
Windows 10 comes with a powerful Defender, which negates the need for any antivirus software; however, if you still need it, consider upgrading to a better antivirus software that doesn't interfere with your operating system's processes.
Fix 11: Restart or reinstall Windows
Unfortunately, if none of the above solutions worked for you, you should consider performing a complete reset or reinstallation of Windows.
Before you do that, you should back up all your essential data to a hard drive. Windows 10 allows you to reset Windows while choosing to keep your personal data intact.
To reinstall Windows, you need to create a flash drive USB containing the Windows image and boot the computer while the USB is inserted.
To reinstall Windows, you must create a USB flash drive containing the Windows image and boot your computer while the USB is inserted.
Final word
BSOD errors are annoying and can be caused by inserting an unknown device, booting applications, interfering software, DisplayLink drivers, incompatible system drivers, virtualization, missing system files or DLLs, etc.
We hope this disquisition has helped you fix the APC Index Mismatch error on your Windows operating system.
FAQs
This is the only way to get the most out of the operation.
What is an APC index mismatch?
APC (Asynchronous Procedure Call) Index Mismatch is a BSOD error that will cause your PC to reboot and Windows to crash with an error message containing the name of the culprit file, such as win32k.sys, vdmp.sys, wdf01000.sys, fltmgr.sys, ntoskrnl.sys.
How to solve the APC index mismatch error?
1. Install the latest updates
2. Check Windows system files with System File Checker
3. Update or reinstall the driver
4. Disable Realtek HD Audio Manager from startup
5. Deploy a BSOD troubleshooter
6. Uninstall Display Link Driver
7. Change the frequency of your RAM
8. Disable virtualization in the BIOS
9. Check your hardware
10. Remove interfering software
11. Restart or reinstall Windows
How to fix Win32kfull Sys?
1. Install the latest Windows update
2. Check for corrupted system files with SFC
3. Update or reinstall the driver
4. Disable Realtek HD Audio Manager from startup
5. Deploy a BSOD troubleshooter
How to resolve APC Index Mismatch BSOD in Win32kfull?
1. Install the latest updates
2. Check system files with System File Checker
3. Update the driver or reinstall the driver
4. Disable Realtek HD Audio Manager from startup
5. Deploy a BSOD troubleshooter
My name is Javier Chirinos and I am passionate about technology. Ever since I can remember, I have been interested in computers and video games, and that passion has turned into a job.
I have been publishing about technology and gadgets on the Internet for over 15 years, especially in mundobytes.com
I am also an expert in online marketing and communication and have knowledge in WordPress development.