Step-by-Step Guide to Fix Windows Stop Code 0x000000BD

0x000000BD Error: Attempted Switch From DPC BSOD in Windows

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What is the 0x000000BD Error?


The Windows Stop Code 0x000000BD, known as ATTEMPTED_SWITCH_FROM_DPC, appears when a Deferred Procedure Call (DPC) routine incorrectly attempts to perform an illegal operation, such as waiting for an event, executing a blocking call, or switching to a user-mode thread. This behavior violates core kernel scheduling rules and results in an immediate system crash. This BSOD most commonly occurs due to faulty or poorly written drivers, malfunctioning hardware, or corrupted kernel components. It may appear during high I/O operations, heavy driver activity, or system boot when low-level routines fail to respond properly. Systems with outdated drivers, unstable overclocking, or faulty hardware components are more prone to this issue.

Causes

  • Faulty or Corrupted Drivers: DPC routines performing illegal operations.
  • Hardware Failure: Malfunctioning SSDs, HDDs, GPUs, or network cards.
  • Memory Corruption: Faulty RAM causing invalid access within kernel routines.
  • Outdated BIOS/UEFI: Firmware not handling DPC routines correctly.
  • Overclocking Instability: CPU/GPU overclocking is causing scheduling issues.
  • High I/O Stress: Storage or network overload triggering driver flaws.
  • Windows Update or Kernel Corruption: Improper update installation is damaging low-level components.

Resolution Steps




1. Update or Roll Back Drivers

  • Open Device Manager (Win + X - Device Manager).
  • Check for devices with warnings or recently updated drivers.
  • Right-click → Update Driver.
  • If the issue began after an update, click Roll Back Driver.
  • Restart and check system stability.

2. Check and Test RAM for Corruption

  • Turn off the PC and disconnect power.
  • Reseat RAM modules and clean slots.
  • Run Windows Memory Diagnostic:

Mdsched.exe

  • Restart and check for problems.
  • Replace any faulty memory modules identified.

3. Repair System Files with SFC and DISM

  • Open Command Prompt (Admin) and run:

sfc /scannow

DISM /Online /Cleanup-Image /RestoreHealth

  • Restart after completion.

4. Check for Hardware Faults

  • Inspect SSD/HDD health (CrystalDiskInfo or OEM utilities).
  • Reseat the GPU and peripheral cards.
  • Disconnect unnecessary hardware and test boot.
  • Replace faulty storage or PCI devices if errors are found.

5. Disable Overclocking and Reset BIOS/UEFI

  • Enter BIOS/UEFI (F2/F10/DEL).
  • Disable CPU, GPU, and RAM overclocking features.
  • Choose Load Optimized Defaults.
  • Save and reboot.

6. Update BIOS/UEFI Firmware

  • Visit the system or motherboard manufacturer’s website.
  • Download the latest BIOS/UEFI update.
  • Follow their official instructions for safe installation.
  • Restart the device and check for improvements.

7. Perform a Clean Boot to Identify Conflicts

  • Press Win + R - type msconfig.
  • Go to Services - Check Hide all Microsoft services - Disable all.
  • Open Task Manager - Disable all startup applications.
  • Reboot and observe system behavior.
  • Enable services one by one to identify the problematic item.

8. Run Storage and I/O Diagnostics

  • Open Command Prompt (Admin) and run:

chkdsk /f /r

  • Allow the scan to complete during restart.
  • Fixes storage errors that may trigger DPC conflicts.

9. Use System Restore to Undo Recent Changes

  • Open Control Panel - Recovery - Open System Restore.
  • Choose a restore point created before the BSOD appeared.
  • Complete the restoration and reboot your PC.

10. Perform an In-Place Upgrade or Clean Windows Installation

If issues persist:

  • Download the Windows Media Creation Tool.
  • Choose Upgrade this PC now to reinstall system components while keeping files.
  • If BSOD still occurs, back up data and perform a clean Windows installation.

The 0x000000BD (ATTEMPTED_SWITCH_FROM_DPC) BSOD generally indicates faulty drivers, memory corruption, unstable hardware, or BIOS misconfiguration. To resolve it effectively:

  • Update or roll back problematic drivers.
  • Test and replace faulty RAM.
  • Repair system files and check hardware health.
  • Disable overclocking and update BIOS/UEFI.
  • Use clean boot, system restore, or in-place upgrades when needed.

Maintaining updated drivers, stable firmware, and healthy hardware components helps prevent future 0x000000BD errors, ensuring a reliable and crash-free Windows experience.

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