Fix 0x00000001 BSOD Error: APC_INDEX_MISMATCH

Updated July 2024: Stop getting error messages and slow down your system with our optimization tool. Get it now at this link
  1. Download and install the repair tool here.
  2. Let it scan your computer.
  3. The tool will then repair your computer.


Apc_index_mismatch in Windows 10 is an error caused by driver incompatibility or faulty hardware.
Windows stop code 0x00000001 or apc_index_mismatch is sometimes attributed to Realtek and nvidia drivers.
For this reason, in order to solve your problem, you need to identify the driver and then uninstall or disable it.

Select Start > Settings > Update & Security > Update Windows.
Click View Update History.
Select Security Update for Microsoft Windows (KB5000802) and click Uninstall.
After uninstalling, restart your computer.

Update your video card driver.
Disable C-States and EIST BIOS in.
Recovery of damaged system files.
Check for viruses and malware.
Set up Driver Verification Manager.

A DRIVER_IRQL_NOT_LESS_OR_EQUAL error appearing on a blue screen as shown above indicates a faulty driver. It is caused by corruption; System files, damaged hard drive, misconfigured or outdated drivers.


The Blue Screen of Death error code 0x00000001, also known as the stop error APC_INDEX_MISMATCH, is normally caused when there is a file system shift. This can be done from newly installed software, an inserted CD or DVD drive, or online. The error may start with running the new software – if the error code appears and the software continues to work, the system may be damaged or corrupted.


This problem may also occur due to a problem in the Win32k.sys driver.

The stop error message is similar to the following:

STOP: 0x00000001 (parameter1, parameter2, parameter3, parameter4)

This may be due to the following causes:

1. a kernel application or device driver running in kernel mode has caused an unsuitability of the thread index and APC (Asynchronous Procedure Call). This is probably due to the fact that the number of processes that have entered the critical area does not correspond to the number of processes that have left the critical area. If you run the software at this stage, the system will be damaged or corrupted.

2 This may be due to new hardware or software problems.

3. This error can occur when a CD or DVD is inserted into the drive.

July 2024 Update:

You can now prevent PC problems by using this tool, such as protecting you against file loss and malware. Additionally, it is a great way to optimize your computer for maximum performance. The program fixes common errors that might occur on Windows systems with ease - no need for hours of troubleshooting when you have the perfect solution at your fingertips:

  • Step 1 : Download PC Repair & Optimizer Tool (Windows 10, 8, 7, XP, Vista – Microsoft Gold Certified).
  • Step 2 : Click “Start Scan” to find Windows registry issues that could be causing PC problems.
  • Step 3 : Click “Repair All” to fix all issues.

Download Now

4. This error also occurs if the computer uses the Windows Vista Aero color scheme.

5. sometimes, when we unlock the computer and connect to the default desktop, this STOP error appears.

This STOP error sometimes occurs when the computer goes into sleep mode several times (depending on the client’s use).

This problem can also occur in a secure desktop environment (when we lock the computer) where an application has recorded an “event hook” via an application programming interface.

Problems in the Windows system file win32k.sys can cause this STOP error.

9. Damage to storage can also create these conditions.

Too much RAM (> 2 GB) can exceed the capacities of the motherboard and BIOS and cause this STOP error.

How to correct the error 0x00000001:

Starting in safe mode


Due to the error in the blue screen, you cannot boot normally on your system. If so, please start your computer in safe mode with Networking To Access Windows Desktop and follow the steps below. If the window was started normally after a restart, you can apply the solutions below directly to avoid an APC_INDEX_MISMATCH Blue Screen Error.

Fixing corrupted system files

In addition, sometimes corrupted system files can cause various boot errors, such as APC_INDEX_MISMATCH BSOD Stop code 0x00000001. You can run the System File Checker tool to check or restore missing corrupted system files.

To run the system file checker, press the Windows key and type cmd -> Right-click on cmd and click Run as administrator. Then type the sfc /scannow command in the Command Prompt window and press Enter to execute this command.

This starts the search for missing and corrupted system files if the utility automatically restores them from a special folder in %WinDir%\System32\dllcache. Wait until the scanning is 100% complete after restarting the windows.

Expert Tip: This repair tool scans the repositories and replaces corrupt or missing files if none of these methods have worked. It works well in most cases where the problem is due to system corruption. This tool will also optimize your system to maximize performance. It can be downloaded by Clicking Here

Scroll to Top