0X000000d1 Windows 7 Error Fix

The Stop Error 0x000000d1 may occur on Windows 7 operating system with description “IRQL_NOT_LESS_OR_EQUAL Kbdclass.sys”. At the time it occurs, the colour of the screen changes to blue and so much data is printed on the screen. This screen is called as Blue Screen of Death (BSOD), which automatically restarts your computer. It is a frustrating problem that results in loss of any unsaved data. Most of the users faced this error when they were shutting down their computer.

Why 0x000000d1 does occur on Windows 7?

1. Outdated Version of Logitech Mouse

2. Corrupted Structure of the Registry

3. Unsupported CMOS Features are Enabled

4. Incompatible Hardware

5. Bad RAM

6. Outdated Drivers

Outdated Version of Logitech Mouse

Error 0x000000d1 may occur on Windows 7 computers, if you are using Logitech mouse and the Logitech MouseWare software you had installed is out-of-date. You need to update it from the Logitech’s official website.

Corrupted Structure of the Registry

Registry is mostly responsible for almost all programs in Windows 7 platform. The state of registry influences the stability and performance of your computer. The error 0x000000d1 is too interrelated with registry problems. Hence, it is advisable to have fixing the registry problems first. Get a good registry cleaner recommended by experts.

Unsupported CMOS Features are Enabled

Complementary Metal-Oxide-Semiconductor (CMOS) is a technology for constructing integrated circuits. It is used in microprocessors, microcontrollers, static RAM, and other digital logic circuits. CMOS technology is also used for several analogy circuits such as image sensors, data converters, and highly integrated transceivers for many types of communication.

Error 0x000000d1 may occur on Windows 7 computer by enabling the unsupported features in CMOS Settings. You need to disable the unsupported features as below:

1. Restart your computer.

2. Press F2 or Delete key to load CMOS Settings.

3. Search and disable the following features:

a. All caching, including L2, BIOS, Internal/ External, Writeback Caching on Disk Controllers

b. All Shadowing

c. Plug and Play

d. Any BIOS based virus protection software

4. Save your settings by pressing an appropriate key.

Incompatible Hardware

Hardware incompatibility often results in Error 0x000000d1 on Windows 7 computers. Before connecting hardware to your computer, you must ensure it is designed for the operating system you are currently using. If you had recently installed a new hardware, refer its manual and find out whether it is compatible with your system or not. If it is not, please remove it temporarily.


Random-access memory (RAM) is a form of computer data storage. “Random” refers to the idea that any piece of data can be returned in a constant time, regardless of its physical location and whether it is related to the previous piece of data.

A small problem with your RAM results in operating system crash or error 0x000000d1. That’s why, make sure the existing RAMs are healthy or not. If they aren’t, replace them with new ones.

1. Click Start | Control Panel | System and Maintenance | Administrative Tools | Memory Diagnostics Tool.

2. Click Restart now and check for problems (recommended) option.

3. After your system is restarted, the results may appear on your screen.

Outdated Drivers

A device driver or software driver is a computer program allowing higher-level computer programs to interact with a hardware device. Problems with the installed drivers or outdated drivers off course result in error 0x000000d1 on Windows 7 computer. You need to check for the latest release of the drivers and install them on your system.

1. Click Start | All Programs | Windows Update.

2. Click Check for Updates button.

3. Wait for the process, and install the necessary drivers updates, if any.

4. Reboot the machine after completion.

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