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Problem: How to Fix a Blue Screen with Error Code APC_INDEX_MISMATCH in Windows 10?

Hello, my laptop with Windows 10 Pro keeps crashing and shows a blue screen. Sometimes the blue screen shows me the error code APC INDEX MISMATCH and that igdkmd64.sys failed. I am desperate, I really need my laptop. What can I do to fix this myself?

Accepted answer

The blue screen with the error code APC_INDEX_MISMATCH is mainly caused by incompatible drivers or faulty hardware. In addition to the APC_INDEX_MISMATCH, the code 0x00000001 is also occasionally displayed. The problems can be particularly related to Realtek and Nvidia drivers. Therefore, identifying the faulty driver is essential for troubleshooting. In addition, it is possible that a program that is interfering with the processes of Windows could trigger the blue screen. In this case, deactivating the program will help.

APC_INDEX_MISMATCH is a blue screen or BSOD (short for Blue Screen of Death) in Windows that usually indicates that an incompatible device driver is installed on the system. The blue screen can appear under a variety of circumstances, such as accessing the desktop, plugging in an HDMI cable, or running certain apps.

Many Windows 10 users are currently reporting that the blue screen with the error code APC INDEX MISMATCH indicates a defective file called Igdkmd64.sys. This is a critical system file that is an integral part of Windows 10. The error can also output other names of files (ntoskrnl.exe, fltmgr.sys, wdf01000.sys, win32k.sys).

However, when attempting to correct the APC INDEX MISMATCH error, do not edit Igdkmd64.sys or any other files responsible for the error in any way, as this may cause more damage to the system. Instead, find the corrupt, damaged, or missing application or driver associated with the file.

According to Windows experts, the most common triggers for the blue screen are graphics cards or DisplayLink drivers. Therefore, the first remedy is to update or reinstall incompatible, outdated, or damaged device drivers. If that didn't work, you should check the system for unsuitable software or hardware problems.

How to fix a blue screen with error code APC_INDEX_MISMATCH in Windows 10

Check the system for incompatible software to see if APC_INDEX_MISMATCH is the only problem with the device. Any driver conflicts or problems with missing, damaged device files can be automatically resolved. There are several programs and system tools for this.

However, if you want to fix APC_INDEX_MISMATCH blue screen once and for all, you need to do your research and thoroughly investigate the cause. Programs that could trigger the blue screen are antivirus programs or apps (LogMeIn). To do this, you can run a scan with ReimageMac Washing Machine X9. The tool can display PUPs, unwanted applications and various problematic files. PC optimizers like this one can also repair Windows files if necessary.

Install the latest Windows update

  • Go to the Windows settings.
  • Look for it Update and security.
  • Navigate to Windows Update and click on Looking for updates.
  • Install the latest version.

Have automatic driver updates to fix the APC_INDEX_MISMATCH blue screen

You can update various drivers automatically by installing specific applications. Driver managers update drivers, find missing drivers, and install them so Windows can perform at its best. You are welcome to try DriverFix for this.

Damage caused by incorrect driver installations or incorrect versions of drivers can lead to various error messages, including blue screens such as APC_INDEX_MISMATCH. A driver manager recommends new drivers, updates outdated ones and helps to fix compatibility problems. You can rely on such programs and be sure that the drivers are updated and the installed drivers are compatible with the operating system and applications.

Update drivers through Device Manager

Incompatible or outdated device drivers most often trigger the APC_INDEX_MISMATCH error. So if you can still start Windows, do the following:

  • Right click on the Windows menu and choose Device manager.
  • Now look for the device drivers marked with a yellow exclamation mark. If none of them have a mark, then try updating the graphics card driver first.
  • Right click on the driver and select Update driver software.
  • If that didn't help, you can manually update the device drivers through the manufacturers or download a driver update utility.

Check if there are any problems with files

  • Press begin and look for command prompt.
  • Run them as Administrator out.
  • Give sfc / scannow a.
  • Press the Enter key.
  • Allow the system to search for corrupt and damaged files.

To resolve the APC_INDEX_MISMATCH error, remove the DisplayLink driver

Windows users who use an additional monitor sometimes need a DisplayLink driver. However, Windows experts warn that this particular driver is causing the blue screen with APC_INDEX_MISMATCH. If updating the drivers didn't work, find the DisplayLink driver and remove it.

  • Press the Windows key + I and open Apps.
  • Click on the link Programs and Features.
  • Find the software DisplayLink Core and click on it.
  • Choose Uninstall.
  • Then download the tool to delete all DisplayLink files called DisplayLink Install Cleaner.
  • Run the tool to complete the removal and reboot the system.

Disable the Realtek HD Audio Manager

If you cannot access Windows due to the APC_INDEX_MISMATCH blue screen, boot it into Safe Mode and follow these steps:

  • Restart your PC a few times so that automatic repair begins.
  • Once Windows starts the repair process, select Troubleshooting.
  • Then click on Expanded options and choose Startup settings.
  • Choose Start anew.
  • After restarting, press F5 or 5, to the Safe Mode with Networking to select.
  • In Safe Mode, press the keys Ctrl + Alt + Delto open Task Manager.
  • Open the tab Autostart and look for the Realtek HD Audio Manager.
  • Right-click it and choose Deactivate.
  • Now close the Task Manager and restart the PC.

Repair the errors automatically

The team does its best to help users find the best solution for eliminating their errors. If you don't want to struggle with manual repair methods, please use software that will do it for you automatically. All recommended products have been checked by our experts and recognized as effective. The tools you can use for your bug are listed below:

Reimage - A patented specialized Windows repair program. It diagnoses the damaged PC. It scans all system files, DLLs, and registry keys that have been corrupted by security threats. Reimage - A patented specialized Mac OS X repair program. It diagnoses the damaged computer. It scans all system files and registry keys that have been damaged by security threats.
This patented repair process uses a database of 25 million components to replace any damaged or missing file on the computer.
In order to repair the damaged system, you need to purchase the licensed version of Reimage malware remover.

In order to remain completely anonymous and to prevent your Internet provider and states from spying on you, we recommend using the VPN Private Internet Access. It allows you to connect to the Internet in a completely anonymous way, encrypting all information and blocking trackers, advertisements and malicious content. Most importantly, you stop illegal surveillance activities that the NSA and other government institutions are doing behind the scenes.

Unforeseen circumstances can occur at any time while using the computer: The computer could shut down due to a power failure or a blue screen, or it could restart due to a new update while you were gone for a few minutes. Schoolwork, important documents, and other data can be lost as a result. To restore these files, you can use Data Recovery Pro - it scans existing copies of the files on your hard drive and quickly restores them.

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