BSOD error IRQL NOT LESS OR EQUAL
#1
The computer will give a blue screen with the error message IRQL NOT LESS OR EQUAL

In the windows Event Viewer the following error would be logged:

The computer has rebooted from a bugcheck.  The bugcheck was: 0x000000d1 (0x0000000000000000, 0x0000000000000002, 0x0000000000000008, 0x0000000000000000). 


There is 4 Parameters to check here:

1 - Memory Referenced
2 - IRQL at time of reference
3 - 0: Read 1: Write 8: Execute
4 - Address that referenced memory

If the first parameter has the same value as the fourth parameter, and the third parameter indicates an execute operation, this bug check was likely caused by a driver that was trying to execute code when the code itself was paged out.

In other words, the IRQL error is a memory related error.

This error has been known to occur as a result of one of the following causes:

Cause 1: Corrupt system files

The most common cause for this error is a corrupted system file that is required to boot the system. This can happen because of virus attacks, power outages, or disk write errors.

Cause 2: Incompatible device drivers

Another common cause is a newly installed faulty device driver. In that case, reverting to an old version of a driver would be the best solution.

Cause 3: Faulty hardware items

This error can also be caused by a damaged motherboard or a bad RAM module.

Cause 4: Incorrect software installation

Sometimes, this error may be caused by a misconfigured Windows service.

Cause 5: A downgraded Windows installation

The least common cause for this error is when an older version of Windows is installed on top of a newer one. Sometimes, the system files are not replaced properly, and if that is the case, then the user should back up the files and perform a clean install to make sure there are no conflicts between different versions of Windows.

Possible Fix: Disable memory cache

To disable the memory cache of your Windows system, you need to enter in your computer’s BIOS/UEFI menu.

Follow these steps for Windows 8/8.1 systems so you can open the UEFI menu:

  1. Start your Windows
  2. Press Windows key and the C key to open the Charm Bar
  3. Click Settings
  4. Go to Change PC Settings
  5. Select General
  6. Click Advanced Startup
  7. Click Restart Now
  8. Go to Troubleshoot
  9. Select Advanced Options
  10. Click UEFI Firmware Settings
  11. Select Restart
Once you’ve entered the BIOS/UEFI menu of your system, follow these steps:

  1. Go to the Advanced Menu. Depending on your BIOS/UEFI version, this menu may have a different name.
  2. Find the Cache Memory option
  3. Hit Enter
  4. Select Disabled
  5. Press F10 to Save & Exit your changes
  6. Restart your computer
A general fix for this error to remove all the GPUs and then boot into windows one by one testing until you find the card that trigger the IRQL NOT LESS OR EQUAL error.
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