Windows BSOD Error 0x000000D1 — DRIVER_IRQL_NOT_LESS_OR_EQUAL Fix

What Does This Error Mean?

The 0x000000D1 blue screen means a driver tried to access memory at an incorrect address. This is called DRIVER_IRQL_NOT_LESS_OR_EQUAL. It almost always points to a specific buggy or outdated driver, most commonly a network or graphics driver.

Affected Models

Windows 10
Windows 11
Windows 8.1
Windows Server

Common Causes

A network adapter driver (Wi-Fi or Ethernet) is buggy or outdated
A graphics card driver has a bug or is incompatible with your Windows version
A recently installed driver is poorly written or corrupted
VPN software installed a faulty network driver
Antivirus software installed a filter driver that conflicts with Windows

How to Fix It

Look at the blue screen for a driver file name. It often shows something like 'ndis.sys', 'tcpip.sys', or a specific driver name. Write it down.

This file name tells you exactly which driver is crashing. You can search online to find what program or device it belongs to.
Update your network drivers. Go to Device Manager > Network Adapters, right-click your Wi-Fi and Ethernet adapters, and choose 'Update driver.'

Network drivers are the most common cause of this specific error code.
Update your graphics driver from the manufacturer's website (NVIDIA, AMD, or Intel). Do not rely on Windows Update for graphics drivers.

Download the driver directly from the manufacturer for the best compatibility and latest fixes.
If you use a VPN, try uninstalling it temporarily. VPN software installs virtual network drivers that can cause this error.

If the blue screens stop after removing the VPN, check for an updated version of the VPN software or contact their support.
Use Driver Verifier to identify the problem driver. Search 'verifier' in the Start menu and enable standard settings for all non-Microsoft drivers.

Warning: Driver Verifier may cause more blue screens as it tests drivers. Only use this if you are comfortable troubleshooting.

When to Call a Professional

If you have identified the problem driver but cannot find a working replacement, a technician can help. This error is almost always software-related, so it rarely requires expensive hardware repairs. Most repair shops can resolve driver issues in under an hour.

Frequently Asked Questions

What is the difference between 0x0000000A and 0x000000D1?

Both errors are about improper memory access. The 0x0000000A error can be caused by any component. The 0x000000D1 error specifically points to a driver as the culprit, which makes it easier to troubleshoot.

Why do network drivers cause so many blue screens?

Network drivers run at a very deep level in Windows. They handle millions of data packets every minute. A small bug in a network driver gets triggered frequently, which is why network drivers are the most common cause of driver-related blue screens.

Should I roll back a driver instead of updating?

If the blue screen started right after a driver update, rolling back is a good idea. In Device Manager, right-click the device, choose Properties, go to the Driver tab, and click 'Roll Back Driver.' This restores the previous version that was working fine.