Fix – Update fail BSOD error iastora.sys on Windows 10

BSOD error iastora.sys is a blue screen of death error that primarily arises after installing Windows 10 may 2019 update. In a few scenarios, this may even restrict updating your current Windows OS. In general, this bug appears with message DRIVER_IRQL_NOT_LESS_OR_EQUAL (iaStorA.sys) or SYSTEM_SERVICE_EXCEPTION (iaStorA.sys). Anyways, here in this quick guide, we discuss the probable solutions to fix this anomaly.

The possible reasons behind this BSOD error iastora.sys are improper functioning Intel IRST or IDE ATA/ATAPI driver. In addition to these, recent third-party apps, corrupt system core files may also bring this BSOD error. Update faulty driver, run sfc command, uninstall the problematic software, use System Restore point will help you to avoid this BSOD. If the bug still persists, perform a clean installation of Windows.

Update fail BSOD error iastora.sys on Windows 10 Solution

Here are the stepwise workarounds to fix BSOD error iastora.sys on Windows 10 PC-

If you don’t receive the login screen, it becomes really difficult to try these troubleshooting guides. Hence, you need to enter into the safe mode to access the sign-in window.

Remove the IRST drivers

In case, the BSOD error iastora.sys is frequently appearing and thus can’t update the Windows, the IRST driver may be the possible reason. It is thereby recommended to uninstall the related IRST drivers to solve this error. Here’s how to proceed-

  • Right-click on Windows icon and choose Run option.
  • Type devmgmt.msc then tap OK to launch Device Manager.
  • Henceforth, expand IDE ATA/ATAPI controllers category.
  • Thereupon, do the right-click on each driver separately and select the Uninstall device option from the context menu.

BSOD error iastora.sys

  • Repeat this process systematically until each driver under IDE is removed.

Note: There is no need to re-install the IDE ATA/ATAPI controllers again. This is because they will auto-install themselves during the next Windows 10 update.

  • Once you have successfully uninstalled all the ATA/ATAPI controller, Restart your system to save the changes made so far.

Update the Intel Rapid Storage Technology (IRST) drivers 

If you still are getting the BSOD error iastora.sys, there may be corrupt or outdated IRST drivers. All you require is to then update this with the latest version. Here are the steps-

  1. Click on the Search icon and type Device Manager in the text box, hit the well-matched option.
  2. Next, locate and right-click on the Intel Rapid Storage Technology (Intel RST) driver from the list.
  3. Again, select the Update driver option using the context menu.
  4. Now, press the “Search automatically for updated driver software” button and let it download the latest version.
  5. Once the task is over, Reboot your PC and try updating your Windows.

Uninstall buggy applications

Sometimes faulty software like third-party anti-virus, recently installed apps may also arise this BSOD error iastora.sys. If that’s the case, try uninstalling the recent third-party apps one by one and see whether doing this fix this trouble-

  • Press Win and I hotkey together to launch Settings.
  • Here, select Apps thereafter Apps & Features from the left pane.
  • Switch to the corresponding right pane, scroll downward and select the latest app.
  • Thereupon, hit the Uninstall button followed by Uninstall again to confirm the changes.

Uninstall the app

  • Once you remove the app successfully, Restart your system normally.

Disable the background running Services

Usually, the services which are running at the background unnecessarily may also lead to BSOD error iastora.sys on your system. Disabling these services may fix this anomaly-

  • Press Win & R hotkey together to launch Run dialog.
  • Type msconfig in the text area henceforth hit the OK button.
  • When the System Configuration window appears, hit the Services tab.
  • Move to the lower pane and mark Hide all Microsoft Services checkbox.
  • Here, click on the Disable all button then OK to confirm the changes.

BSOD error iastora.sys

  • Now go back to the System and update your Windows 10 PC. 
  • Once you perform the above steps, reboot your system and re-enable all the services using the above process.

Delete Windows.old folder

After Upgrading the OS, a new folder “Windows.old” appears by default in the root directory. This keeps the record of the previous OS files. This may arise some bugs like BSOD error iastora.sys on the Desktop. To solve this problem, you need to delete Windows.old folder by following these steps-

  • Right-click on the Windows icon and select Run from the Power menu.
  • When the dialog appears, type cmd in the text area and simultaneously hit Ctrl+Shift and Enter key.

BSOD error iastora.sys

  • The Command Prompt will start-up with administrative privileges.
  • Next, execute the following codes. Make sure to hit the Enter key at the end of each code.
attrib -r -a -s -h C:Windows.old /S /D
RD /S /Q %SystemDrive%windows.old

BSOD error iastora.sys

  • After you finish the above steps, Restart your system to save the changes made so far.

Run sfc/scannow command

The System File Checker is another utility command of Windows 10 to fix various core file issues. This code identifies the corrupt system files and repairs the same. Here’s how to proceed-

  • Launch the Start Menu then type Command Prompt.
  • When the matching result appears, right-click on it and choose Run as administrator option.
  • If UAC prompts, tap Yes.
  • Type sfc/scannow near the blinking cursor then hit Enter key.

sfc/ scannow

  • This is a time-consuming process, so wait accordingly.
  • Make sure to restart your PC once the above process completes.

Use System Restore Point

If you continue receiving the BSOD error iastora.sys interruption, you should better use the backup image of system files. This solution is applicable only when you have previously created a System Restore Point. Here are the steps to follow-

  • Click on the Search icon and type System Restore Point. Double-click on the matching result.
  • Under the System Protection window, select System Restore button afterward Next on the succeeding page.

System Restore

  • Further, select the recently created Restore Point from the list. See the Snapshot below-
  • Now do the click on Scan for affected programs to detect any faults in this file, then Next button.

BSOD error iastora.sys

  • Moving ahead tap Finish to confirm the changes.
  • At last, Restart your system.

Most probably, you won’t see this interrupting BSOD error iastora.sys on your Windows Machine.

Clean install Windows 10

Even after applying all the above fixes, if the BSOD error iastora.sys still persists, you must install Windows 10 1903. To perform this task, you require a Media Creation Tool. Just plug the tool to its respective port and follow the on-screen instructions. If you don’t have the Windows Setup file, follow these steps to get one-

BSOD error iastora.sys

  • After you download the setup file, double-click on the same to start the installation. Next, check the “I Agree” option to accept Microsoft’s terms and conditions.
  • Subsequently, enable the checkbox against Create Installation Media (USB flash drive, DVD or ISO file) for another PC then Next to proceed.
  • Now select your preferred language, architect and edition. Henceforth, deactivate Use the recommended option for this PC option followed by the Next button.

Install Windows 10

  • Succeeding that choose USB flash drive radio button then Next again.
  • At last, click on the Finish button to complete the process. Once over, Reboot your PC.