How to Resolve iaStorA.sys Blue Screen Error in Windows Computers

  • When an iaStorA.sys error occurs, it is often accompanied by the error code driver_irql_not_less_or_equal or KMODE_EXECECEPTION_NOT_HANDLED.
  • Possible causes of the problem may be problems with Intel RST drivers, corruption in system files or registry, or in the system image, infection of your computer with malware or viruses, outdated Windows, and other Windows problems.

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Iastore Sys

The genuine iaStor.sys file is a software component of Intel Application Accelerator Driver by Intel Corporation.The “iaStor.sys” driver is part of the Intel Application Accelerator which must be installed when the computer is first configured. It enables using two or more hard disks in a Redundant Array of Inexpensive Disks (RAID) configuration. If “iaStor.sys” is stopped or uninstalled all data on any disks involved will be lost, which may include the Windows OS. The computer must have a supported chipset configuration, (including an Intel RAID option ROM chip) and the right kind of hard disks. “iaStor.sys” is one of six modules that must be installed twice, (first through BIOS at system setup and then reinstalled when in Windows), including “iaStor.inf” and “,” in order to use RAID disk management logic. Intel Corporation, an American multinational semiconductor manufacturer based in Santa Clara, CA, USA, is the world’s largest and highest valued.

IaStorA.sys may be the cause of some BSOD crashes reported by users. The error codes most frequently reported with these crashes are DRIVER_IRQL_NOT_LESS_NOR_EQUAL (iaStorA.sys) or SYSTEM_SERVICE_EXCEPTION (iaStorA.sys).

When installing a new feature update, your computer is likely to encounter an error called iastora.sys, a blue screen of death error. In the event that it appears, it may make it difficult to update apps or install updates, or even cause a blue screen. In some cases, you will receive an error message like – DRIVER_IRQL_NOT_LESS_OR_EQUAL (iaStorA.sys) or SYSTEM_SERVICE_EXCEPTION (iaStorA.sys).

The Blue Screen of Death (BSOD) error can occur with any version of Windows 7, 8, 8.1, or 10, no matter what version you run. To ensure you realize the gravity of the situation, your system shows you when it cannot handle some critical problem. In the case of the IaStorA.sys BSOD, your PC crashes when there is an issue with the IaStorA.sys driver.

CMUSBDAC.SYS error, iaStorA.SYS BSOD error, etc., can often appear when you open your computer.

Iastor.sys Blue Screen

As a result of this error code, iaStorA.sys, which is part of Intel’s Rapid Storage Technology, has been violated. Kernel-mode drivers have often encountered this issue when trying to access pageable memory at an IRQL that is too high. In our case, we encountered this issue due to the Intel Rapid Storage Technology driver which used improper addresses.

The driver in question, which is the culprit behind all this mess, comes as part of Intel RST (Rapid Storage Technology). The reason why you see the driver_irql_not_less_or_equal (IaStorA.sys) error message (or something like that) is the IaStorA.sys driver using improper addresses. To put it in a nutshell, the driver is acting up, thus causing your PC to malfunction. Although that might seem quite a gloomy picture, there is no need to despair: with just a little effort, you can eliminate that disturbing issue.

In this article, we will talk about iaStorA.sys BSOD error. When an iaStorA.sys error occurs, it is often accompanied by the error code driver_irql_not_less_or_equal or KMODE_EXECECEPTION_NOT_HANDLED.

What are the reasons for iaStorA.sys blue screen error?

What causes blue screen error 0x000000EA?

Choose Uninstall device from the context menu when you right-click the driver you want to uninstall (e.g. Standard SATA AHCI Controller).

If your BSOD drama is over, restart your PC. You will have your controller drivers automatically reinstalled.

Your computer may be infected with malware or viruses or have outdated Windows, which may be the cause of the problem.

We’ll show you how to resolve the problem. Let’s see what we’ve done.

How to repair iaStorA.sys blue screen error message?

Updated: February 2024

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Drivers for IRST need to be reinstalled

  1. You can open Device Manager by pressing Windows+Q together, then clicking the Open button.
  2. (see picture) Expand the list of IDE ATA/ATAPI controllers by double-clicking them.
  3. The device driver can be uninstalled by selecting the Uninstall Device option by right-clicking the driver (such as SATA AHCI controller).
  4. By selecting Uninstall driver software for this device, you will be able to uninstall the driver software.
  5. You will need to repeat the procedure for all IDE ATA/ATAPI Controllers listed in this category.
  6. Your Windows 10 computer should be rebooted at the end.

Remove conflicting third-party applications

  1. The settings can be accessed by pressing Windows + I at the same time.
  2. The preinstalled tiles contain apps you can select.
  3. The conflicting third-party application can be eliminated by selecting it under Apps & Features and clicking Uninstall.
  4. It is recommended that you restart your computer after you have uninstalled all problematic apps.

Restore Windows 10

How do I fix Windows application error 0xc0000906?

  1. To create a system restore point, press Windows and Q simultaneously, and then type the name System Restore Point.
  2. You will find the System Restore button under System Protection.
  3. You will see a dialog box asking you to click Next ->.
  4. The corrupted files on your Windows system can be located by selecting a restore point and clicking Search for affected programs.
  5. Click Next – and then continue.
  6. The recovery process will begin once you click Finish.
  7. Once the recovery process has been completed, restart your computer.

Close all background services and refresh Windows

  1. The Run dialog box will appear when you press Windows + R simultaneously.
  2. A window for System Configuration will open after typing MSConfig.
  3. To hide all Microsoft services, click the Hide all Microsoft services checkbox on the Services tab.
  4. Save your changes by clicking Disable All and applying – > OK.
  5. Click Open Windows Update Options after pressing the Windows key.
  6. Updates can be found by clicking here.
  7. Start the update download by clicking Install Now. Restart your computer when it is complete.

RECOMMENATION: Click here for help with Windows errors.

Frequently Asked Questions

This specific error code indicates that there has been a breach in the iaStorA.sys file, which is part of Intel Rapid Storage Technology (RST). It usually indicates that a kernel-mode driver attempted to access removable memory with too high an IRQL process.

  1. On your keyboard, press the Windows logo key and R at the same time, then type Devmgmt. MSC in the box and press Enter.
  2. Double click on the IDE ATA/ATAPI. Then right-click on ANY ITEM underneath it and select Remove Device.
  3. Reboot your computer and see if the iaStorA.sys problem has been resolved.

Possible causes of the problem could be problems with Intel RST drivers, corrupted system files or registry or system image, infected computers with malware or virus, outdated Windows, and other Windows problems.

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Mark Ginter is a tech blogger with a passion for all things gadgets and gizmos. A self-proclaimed "geek", Mark has been blogging about technology for over 15 years. His blog,, covers a wide range of topics including new product releases, industry news, and tips and tricks for getting the most out of your devices. If you're looking for someone who can keep you up-to-date with all the latest tech news and developments, then be sure to follow him over at Microsoft.