How to remove an iaStor error

The file iaStor.sys is a Windows driver. A driver is a small software program that allows your computer to communicate with hardware or connected devices. This means that a driver has direct access to the internals of the OS, hardware etc.
The free file information forum can help you determine if iaStor.sys belonging to the Windows system or an application you can trust.

Run a free scan to check for iaStor drivers in need of updating

IaStor.sys file information

The process known as Intel Matrix Storage Manager driver (version ia32, x64) or Intel Application Accelerator driver or Intel AHCI Controller belongs to software Intel Matrix Storage Manager driver or Intel RAID Controller or Intel AHCI Controller or Intel Integrated RAID by Intel (www.intel.com).

Description: The file iaStor.sys is located in the folder C:\Windows\System32\drivers. Known file sizes on Windows 7/XP are 874,240 bytes (37% of all occurrences), 872,064 bytes and 14 more variants.
The driver can be started or stopped from Services in the Control Panel or by other programs. The program has no visible window. The service has no detailed description. IaStor.sys is not a Windows core file. File iaStor.sys is a Microsoft signed file. iaStor.sys seems to be a compressed file. Therefore the technical security rating is 24% dangerous, however also read the users reviews.

Recommended: Identify iaStor.sys related errors

Important: Some malware camouflages itself as iaStor.sys, particularly when located in the c:\windows or c:\windows\system32 folder. Therefore, you should check the iaStor.sys process on your PC to see if it is a threat. We recommend Security Task Manager for verifying your computer's security. This was one of the Top Download Picks of The Washington Post and PC World.

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User Comments

If you have RAID configuration do not remove file!
Roni (further information)

This file was made by Intel to give Windows more access to the harddrive. It is a file that Dell machines will request upon an installation of windows xp.
Otto

iastor.sys is the intel matrix storage manager driver file. You may be able to start and stop it but once windows loads it's always running anyways if you have a HDD controller that needs it.
Mike (further information)

Windows XP needs it so instal.
Adam Ehrman Shapiro

necessary file as it blocks windows from starting up when damaged
Simmons

Intel Application Accelerator RAID Edition

IASTOR.SYS is a driver used to control the SATA disks, usually for raid systems but still used in normal single disk setups as well. It should NOT be removed.
waldbm

HP Pavilions also affected
Lance Vannorsdel

I just deleted mine on the same error and now i am unable to reach the windows log on screen befor it bsod on me
B money

if you want to re- instal windows you got to have this file, or else your setup will freeze
bjoyer

System blue screene while running audit32 for trackit

IAStor.sys is bei Intel Chipsätzen für die Ansteuerung der Festplatten bzw. anderer Massenspeichergeräten am IDE/SATA Controller notwendig
Gonscho (further information)

When I searched on iastor I found the file in windows/system32/drivers was not the same size as the oem store. I deleted it copied and paste the oem version and everything is now OK.
Robin Harris

Intel Storage System
SUICIDE

boot divice
abdull moosa

Go to intel.com search iastor.sys download newest driver. Intel® Matrix Storage Manager version 8.8
(further information)

The same thing happened to me when I wanted to reload the XP Home. I asked the friends who are specialists on the computers and they checked if loading is possible without the hard disk. Yes it was possible and they decided that the hard disk is defective. So I bought a new hard disk and reloaded all the softwares I needed. But it has been out of order aftr one day. So I tried the old one again while I sent the new one for service. I removed almost all the programs from the hard disk and tried...Yes it was successful. Now I am using the old defective one on my laptop while waiting the new one.
Hasan Akyüz

it is intel sata/raid controler driver, it is very needed
Jerry

it is SATA driver

Intel SATA RAID driver.
Scottie B

SATA drive controller file
Mike

install windows xp on sata hdd
Hanif Salyani

Since it is necessary, it's a target for infection by some Trojan type viruses, such as Tidserv. Your computer may not boot if it is removed, even into safe mode, if you remove it, and if infected it cannot be cleaned or unloaded by Symantec Endpoint Protection. I would replace the file with a clean version from an uninfected computer.
Random computer repair guy (further information)

It's a SATA driver
Ronald

Very important file; run malwarebytes to check for infection if in doubt, otherwise don't touch.
Will

In addition to Dell problems (see link) the file may not be called due to Win32/Patched.CJ Trojan
Nan (further information)

I had to repair install my Windows xp and it asked for this file. O cancelled because I didn't know where it was and Windowd wouldn't boot. I reinstalled and found the location through this site and Windows installed. This file is definitely needed.
I. Patel

Intel RAID/AHCI Treiber
malt0r

iaStor.sys is an essential file to your computer, if you have it. It's all part of the RAID/ICH system and if you have a laptop with Sigmatel Sound, ICH is critical and necessary for the sound to work. Don't know why? However, if your RAID/ICH is messed up, you may have to re-install XP or you may have to remove AHCI and other things first and re-install your RAID/ICH first before re-installing the other system functions such as the AHCI. Search Google for more info on how you can fix this. I am still working on it myself but I am finding it should not be disabled or removed! This is an Intel product made for Dell. If it's on your system, don't try to disable it. For things to work correctly again, it may need to be fixed or re-installed.
Dell User

This file is core for Windows. I may say from firsthand experience that without this file intact, Windows Seven will BSOD, making for a difficult workaround situation when no external media [i.e. valid install CD] is present.
Cyberdemon

It is linked in with SATA and the hard drives, without it your machine is unlikely to boot.
Dan

Not found at all in my XP SP3 32-bit system running in IDE mode. Think it is needed in AHCI mode
ELeong

a link to a clean copy is what's needed here on this page.
Marie

My computer will crash after ~20 minutes of inactivity regardless if there's a screensaver running, and iastor.sys is always mentioned in the .dmp
Mikemc

Get kapersky task killer run from safemode it will fix the iastor.sys BSOD
Chay chauncey

its the SATA drive config file!
John (further information)

Sure you can boot, & surely the PC will run wonderful without it. I ran my PC for weeks, with an Asus MB, Intel i7 2600K. The problem started when I turned on the AHCIP in the BIOS, only then window asks for the "PCI" file. My PC crashes BSOD when I try to load it. So I run without it until Intel fixes their driver. The same driver is used on all intel chipsets (not only on Dell as said above). It's a very poorly written software driver, Over 8,000 complaints from DELL customers alone. + thousands more.You can run Windows without it (not essential, but you may not be able to run in RAID.
demaX

Keep getting BSoD from it!

Causes BSOD when Windows defender scans for malware
Mike

Mine isstor.sys BSOD was a trojan. Ran micosoft security scanner and Malware Bytes to remove. This was a backdoor trojan so, unfortunately Security Essentials didn't detect it

I cannot install windows XP P ro witout it.
Ior

Summary: Average user rating of iaStor.sys: based on 60 votes with 41 reviews.

45 users think iaStor.sys is essential for Windows or an installed application. 7 users think it's probably harmless. 3 users think it's neither essential nor dangerous. 1 user suspect danger. 4 users think iaStor.sys is dangerous and recommend removing it. 6 users doesn't grade iaStor.sys ("not sure about it").

IaStor scanner

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