This article describes how to fix a IRQL_NOT_LESS_OR_EQUAL error in Windows.
IRQL NOT LESS OR EQUAL
If you boot your computer and receive a blue screen IRQL error, you could either have a problem with either the hardware or the software. Or it could be both. Locating the source of this problem can be frustrating, especially if you haven't recently installed any new components or applications. Generally, this is a problem with a new piece of hardware or software, and updating the offending part will usually resolve the issue. The following suggestions will help you track down and resolve the problem.
Steps to Resolve IRQL Errors
Write down the exact error message.
Unplug any external SCSI or USB devices
Tap F8 key and see if you can get into Safe Mode
Remove any new hardware or software.
Test the memory using Memtest86
Move Network Interface Card to a different PCI slot if it is a card.
If the problem does not persist in Safe Mode, the most likely culprit is a bad device driver. Start by updating the driver for the network card, then any other new hardware that might have recently been added.
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If you boot your computer and receive a blue screen IRQL error, you could either have a problem with either the hardware or the software. Or it could be both. Locating the source of this problem can be frustrating, especially if you haven't recently installed any new components or applications. Generally, this is a problem with a new piece of hardware or software, and updating the offending part will usually resolve the issue. The following suggestions will help you track down and resolve the problem.