Solved: APC INDEX MISMATCH (0X00000001) BSOD Crash on Windows 10/11

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Solved: APC_INDEX_MISMATCH (0X00000001) BSOD Crash on Windows 10/11

The APC_INDEX_MISMATCH (0x00000001) Blue Screen of Death (BSOD) is a frustrating error that can occur in Windows 10 or 11, often leading to system crashes. This stop code indicates an issue with the Advanced Programmable Interrupt Controller (APIC), which manages hardware interrupts in your computer. While this error doesnt always cause immediate data loss, it can lead to system instability if left unresolved. Below, well explain what causes this BSOD and provide step-by-step solutions to fix it.

What Causes the APC_INDEX_MISMATCH (0x00000001) Error?

The error typically occurs due to:

  • Faulty or outdated device drivers, especially those related to hardware components like your motherboard, graphics card, or network adapter.
  • Corrupted system files due to incomplete updates, malware, or improper shutdowns.
  • Hardware issues**, such as failing RAM, a damaged hard drive, or overheating components.
  • Incompatible software or drivers** that conflict with Windows core processes.

How to Fix APC_INDEX_MISMATCH (0x00000001) BSOD

### **Method 1: Run System File Checker and DISM**

A corrupted system file can trigger this error. Use Windows built-in tools to repair it:

  • Press Win + X, then select Terminal (Admin) or Command Prompt (Admin).
  • Run the following commands one by one, pressing Enter after each:
    DISM /Online /Cleanup-Image /RestoreHealth
    sfc /scannow
  • Restart your PC and check if the issue persists.

### **Method 2: Update or Reinstall Drivers**

Outdated or conflicting drivers are a common cause. Heres how to fix them:

  • Press Win + X, then select Device Manager.
  • Expand categories like Display adapters, Network adapters, or System devices. Right-click any device with a yellow warning icon and choose Update driver.
  • If no updates are available, right-click the device again and select Uninstall device, then restart your PC to reinstall it automatically.
  • For motherboard/chipset drivers, download the latest version from your laptop or desktop manufacturers support page (e.g., Dell, HP, ASUS).

### **Method 3: Check for Hardware Issues**

Faulty RAM or a failing hard drive can cause this error. Test them with:

  • RAM Test: Use Windows Memory Diagnostic:
    • Press Win + R, type mdsched.exe, and hit Enter.
    • Select Restart now and check for problems (recommended).
    • Follow the on-screen instructions to test RAM.
  • Hard Drive Check: Run CHKDSK: 
          cmd
      chkdsk C: /f /r
      (Replace "C" with your drive letter if needed. Press Y when prompted, then restart.)

### **Method 4: Disable Fast Startup**

Fast Startup can sometimes conflict with hardware initialization:

  • Open Control Panel > Power Options > Choose what the power buttons do.
  • Click Change settings that are currently unavailable.
  • Uncheck Turn on fast startup (recommended), then save changes and restart.

### **Method 5: Check for Overheating**

Overheating can trigger hardware-related BSODs. Use third-party tools like HWMonitor to monitor CPU/GPU temperatures. If overheating is detected, clean dust from fans or reapply thermal paste if needed.

### **Method 6: Test in Safe Mode**

If the error occurs only in normal mode, boot into Safe Mode (hold Shift + Restart during startup) to check if a third-party app is causing it. If stable, use Safe Mode troubleshooting to identify the culprit.

### **Method 7: Reinstall or Update BIOS/UEFI**

An outdated BIOS can cause hardware-related BSODs. Check your motherboard manufacturers website for updates and follow their instructions to flash a new version carefully.

FAQ

Q: Will this error damage my files?

A: No, the BSOD doesnt corrupt stored data, but frequent crashes can lead to file loss if unsaved work exists in memory. Always save your work regularly.

Q: Should I replace my RAM immediately?

A: Only if the RAM test confirms errors. Otherwise, try other fixes firstthis error often stems from drivers or software.

Q: Can a virus cause this?

A: Rarely, but malware can corrupt system files. Run a scan with Windows Defender if other symptoms (slow performance, pop-ups) appear.

Q: Will a clean Windows install fix it?

A: Yes, but try the above steps first. If the issue persists, a reset this PC (Settings > Update & Security > Recovery) may be necessary as a last resort.

By following these steps, you should resolve the APC_INDEX_MISMATCH BSOD and stabilize your system. If problems continue, consult hardware support or seek professional help for deeper diagnostics.

Last Updated: December 12, 2025

Tested on: Windows 10 (22H2) & Windows 11 (23H2)

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