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Windows Boot

How to Fix APC_INDEX_MISMATCH BSOD on Windows

APC_INDEX_MISMATCH BSOD occurs on Windows when loading dependency files or running system processes. Fix APC_INDEX_MISMATCH with this step-by-step guide.

  • apc_index_mismatch
  • fix
  • troubleshooting
  • error
  • windows-boot

What Is APC_INDEX_MISMATCH BSOD?

The APC_INDEX_MISMATCH error indicates a conflict in the system configuration layer, device driver bindings, or essential runtimes. Without resolving this issue, the affected system processes or games will crash on startup or fail to bind correctly.

Common Symptoms:

  • Boot sequence failure or blue screen checks.
  • Application error dialog boxes.
  • Direct3D device driver loading errors.

Step 1: Run SFC Offline Integrity Scan

Initiate code validation checks on the system core:

sfc /scannow

Step 2: Rebuild Boot Configuration

Link your startup records back to active drives:

bcdboot C:\Windows

Step 3: Run Memory Diagnostics

Verify that memory registers are free of hardware faults:

mdsched.exe

Verification and Validation

After executing the repair steps above, restart your system and attempt to launch the program or task that triggered the APC_INDEX_MISMATCH error. Verify that the system registers 0ms lag and behaves cleanly.