Windows 11: This means the error message “IRQL not less or equal”

• Windows 10 and 11 computers sometimes crash with the error message “IRQL not less or equal”.
• In most cases, this is due to an outdated device driver. Check Windows Update to see if all updates are installed.
• In rarer cases, this error can be caused by a hardware defect, for example in the RAM.

The error message “IRQL not less or equal” is probably one of the most well-known Windows error messages when a computer crashes with a blue screen and the infamous sad smiley. But what does it actually mean?

The error message “IRQL not less or equal” often has a fairly simple background. In most cases, it is outdated, missing or incorrect device drivers that cause the PC to crash with this error code. It therefore always makes sense to regularly check the Windows Update menu to see whether updates and driver updates are available. If this is the case, it is best to install it as soon as possible.

Incorrect or outdated drivers cause crashes

After the updates, the device should be restarted to ensure that all drivers have been installed properly. In rarer cases, a defect in the hardware of your computer can also be the reason for the error message – it is usually the RAM that causes problems.

If it is a laptop or a pre-built PC, you should complain about the device if the error message appears more often than every few months. If you have a self-built PC, you can also troubleshoot it yourself using the event history and other tools if you have the expertise to do so.

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