irql_not_less_or_equal (IRQL) error is a blue screen of death error that usually occurs when you start your computer. It is a memory-related error, which appears if a system process or a driver attempts to access a memory address without proper access rights. The IRQL error may be caused by corrupt system files, incompatible device drivers, faulty hardware items, incorrect software installation, and a downgraded Windows installation.
The error has been reported on Windows Vista, XP, 7, 8, and 10. When it occurs, you may see a message like, "A problem has been detected and Windows has been shut down to prevent damage to your computer."
Some of the solutions to this error include:
Please see our in-depth walk-through solutions below.
“irql_not_less_or_equal error” may appear before or after doing a Windows update or upgrade, due to the interruption or incompatibility of the third-party software installed. Disabling or uninstalling the third-party software may fix the error. To disable the third-party software, watch the YouTube video below. To uninstall Windows update, watch the video in solution 2 below.
In Windows Safe mode, drivers are disabled except for Safe Mode with the network, LAN, and WiFi driver works. If you encounter the error in Safe mode with the network, it is possible that the network drivers are the cause. Drivers can be uninstalled in the Windows Device Manager or in the Control Panel.
Option 1. Access Safe Mode using Desktop (Windows 8, 8.1 and 10)
Option 2. Access Safe Mode (Windows 7 and lower)
Watch it here on Youtube
Option 3. Access Safe Mode using Advance Option Windows 10
“irql_not_less_or_equal error” may also be caused by damage or missing registry or Dynamic Link Library (.DLL). You may want to fix it using the sfc /scannow command. Also, if you have created a system restore point, you could use it to restore the previous state of your Windows, see option 3 below.
Option 1. sfc /scannow command
Option 2. System Restore
Hard disk drive (HDD) test using Check Disk
RAM/Memory test check the link here.
Test hardware using BurnInTest
BurnInTest is a software tool that is used to stress the major parts of the computer for endurance, reliability, and stability. Parts include the processor, hard disk drive and memory. To use BurInTest see this YouTube video here.
Windows 8 and 10 has features that reset the operating system back to its original form without losing your files but delete all install program. Try to use it, see if it fixes the problem. Video instruction is provided below.
YouTube video tutorials are provided below;
](https://www.errorsolutions.tech/wp-content/uploads/2018/07/irql_not_less_or_equal-error.png "RE: irql_not_less_or_equal error (Windows 10, 8, 7, XP & Vista)")