Step by Step Guide to Fix Windows Stop Code 0x00000027

0x00000027 Error: RDR File System

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What is 0x00000027?


The Windows Stop Code 0x00000027, labeled RDR_FILE_SYSTEM, is a Blue Screen of Death (BSOD) that occurs when the Redirected Drive Buffering SubSystem (RDR) encounters a fatal condition. This component manages file access over the network using SMB (Server Message Block) protocol. The error typically indicates problems with accessing shared network files or memory exhaustion in kernel mode, especially on systems running legacy file-sharing services. This BSOD may arise due to incompatible or outdated network drivers, third-party antivirus software interfering with file sharing, or memory allocation failures during remote file access operations.

Causes

  • Faulty or Outdated Network Drivers: Incompatible or broken network interface drivers can trigger RDR crashes.
  • Low Kernel Pool Memory: Insufficient nonpaged pool memory may prevent RDR from allocating required resources.
  • Antivirus or Security Software Conflicts: Tools that scan or intercept file access may interfere with SMB traffic.
  • Corrupted System Files: Damage to Windows system files may disrupt remote file access services.
  • Malfunctioning SMB Client Services: Issues in the SMB protocol stack can cause RDR instability.
  • High Network Load with Insufficient Resources: Accessing large remote files over slow or unstable connections can lead to timeout or overflow errors.

Resolution Steps




  1. Update Network Adapter Drivers


Press Win + X, open Device Manager, expand Network adapters, right-click your adapter → Update driver. Reboot and test for stability.

  1. Run Memory Diagnostics Tool


Press Win + R, type mdsched.exe, and run the Windows Memory Diagnostic tool to check for faulty RAM, which can trigger RDR allocation issues.

1.Disable Antivirus Temporarily

Temporarily disable third-party antivirus or endpoint protection tools to see if they’re conflicting with SMB file sharing. If the BSOD stops, consider switching security software.

2. Adjust Nonpaged Pool Memory Settings

  • Open Registry Editor (regedit), navigate to:
  • HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management
  • Ensure the system is optimized for enough nonpaged memory. Use caution when editing registry.


3.Run SFC and DISM

  • Open Command Prompt as Administrator. Run:
  • sfc /scannow
  • Then run:
  • DISM /Online /Cleanup-Image /RestoreHealth
  • This ensures system file integrity, especially for network and file-sharing components.

4.Check SMB Client and Workstation Services


Press Win + R, type services.msc, and ensure Workstation and SMB Client services are running and set to automatic. Restart if needed.

5.Perform System Restore

If the BSOD began after recent changes:

  • Go to Control Panel → Recovery → Open System Restore.
  • Choose a restore point from before the issue began and follow the prompts to revert.


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