If you’ve been using your Windows 10 PC for a long time now, you might have come across a couple of issues – from minimal ones to critical ones like the Blue Screen of Death or BSOD stop errors. One of these BSOD errors you can encounter is the DRIVER_IRQL_NOT_LESS_OR_EQUAL Blue Screen error. This particular BSOD error is caused by iaStorA.sys, iaisp64 sys, Netwtw04.sys, nvlddmkm.sys, ndis.sys, wrUrlFlt.sys, and other driver files on Windows 10. This error indicates that a kernel-mode driver tried to access pageable memory at a process IRQL that was too high. When you encounter this error, just like a typical BSOD error, your computer will abruptly stop and you will see a blue screen with an error message saying:
“Your PC ran into a problem and needs to restart. We’re just collecting some error info, and then we’ll restart for you. (100% complete)
If you’d like to know more, you can search online later for this error:
DRIVER_IRQL_NOT_LESS_OR_EQUAL (wrUrlFlt.sys)”
The iaStorA.sys file is a software component that’s related to the Intel Rapid Storage Technology by Intel. It is a software solution supported by Intel Smart Response Technology which allows the PC to communicate with the hardware as well as externally connected devices. The Intel Rapid Storage Technology enables the Peripheral Component Interconnect Express or PCIe storage support, serial ATA RAID or Redundant Array of Independent Disks 0, 1, 5, and 10 support, and the PUIS or power-up in standby is also supported.
To resolve this kind of BSOD error, you have to update, roll back or fresh-install the problematic driver. Refer to the options laid out below for detailed instructions.
The first thing you can try is to fix the Wi-Fi driver or the Ethernet driver on your computer to resolve the BSOD error. Take note that this option works not only on Windows 10 but also other Windows versions.
If you’ve already tried uninstalling the IRST driver but you’re still getting the DRIVER IRQL NOT LESS OR EQUAL Blue Screen error when you use your Windows 10 PC, then this means that the drivers might be corrupted or not compatible with the operating system version that you are using right now. So to fix the problem, you have to update your drivers. To do that, follow the steps below.
Alternatively, you can also update the drivers via the Device Manager:
System File Checker or SFC is a built-in command utility that helps in restoring corrupted files as well as missing files. It replaces bad and corrupted system files to good system files that might be causing the DRIVER IRQL NOT LESS OR EQUAL Blue Screen error. To run the SFC command, follow the steps given below.
The command will start a system scan which will take a few whiles before it finishes. Once it’s done, you could get the following results:

Error CausesIf you have a Runtime Error 339 issue on your computer, here is a great way how you can fix it right away:
Error code 0x000000D1 is a serious error that is displayed when Windows automatically shuts down to protect the system against further damage.
Usually, when this error occurs, the message displayed to the users states something like STOP 0x000000D1 DRIVER_IRQL_NOT_LESS_OR_EQUAL.
What Causes 0x000000D1 Error?Usually, the STOP 0x000000D1 error code is caused by issues like incompatibilities, third-party drivers, driver conflicts, outdated drivers, malicious drivers, and other related problems.
Speaking technically, the message displayed to the user actually means that the kernel-mode driver has tried to gain access to memory at an unreasonably high process IRQL.
If left unfixed, STOP 0x000000D1 error can become quite serious. Increased frequency of occurrence may not only lead to data loss but can cause system corruption as well. That’s why it is crucial to fix it and to resolve the underlying issues causing it as soon as possible.
Error Causes
In the run box type in Control Panel and press ENTER
In Control Panel find Storage Spaces and left-click on it.
Once storage spaces open, left-click on Create a new pool and storage space
Once you click on create new, you will be greeted with a list of hard drives you can use for this operation.
Please note that all hard drives you choose will be completely erased and formatted and then assign a single drive letter. Click on Create pool.
You will find yourself in new storage options where you can assign a drive letter, give storage space a name, etc.
Error Causes
In run dialog type RegEdit and press ENTER
In registry editor find HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\LanmanServer\Parameters
Right-click on Parameters> New> DWORD 32
Name it IRPStackSize and change the value to 32
Save and reboot your computer.
In run dialog type RegEdit and press ENTER
In registry editor find a key Computer\HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters
Right-click on Parameters> New> DWORD 32
Name it DefaultTTL and change the value to 64
Save and Reboot
In run dialog type RegEdit and press ENTER
In registry editor find a key Computer\HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters
There should be a DWORD Value, TCP1323Opts, if not, then create it. Right-click on Parameters> New> DWORD (32-bit) Value.
Double-click on it and change its value to 1
Save and reboot