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 "iaStor.cat," 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.
IAStor stands for Intel SATA Storage Device RAID Controller
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 operating system, hardware etc. The free file information forum can help you determine if iaStor.sys is a Windows system file or if it belongs to an application that you can trust.
The process known as Intel Matrix Storage Manager driver (version ia32, x64) or Intel AHCI Controller or Intel Application Accelerator driver belongs to software Intel Matrix Storage Manager driver or Intel RAID Controller or Intel AHCI Controller by Intel (www.intel.com).
Description: IaStor.sys is not essential for the Windows OS and causes relatively few problems. The iaStor.sys file is located in the C:\Windows\System32\drivers folder.
Known file sizes on Windows 10/8/7/XP are 874,240 bytes (29% of all occurrences), 872,064 bytes and 8 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. The iaStor.sys file is a Microsoft signed file. iaStor.sys appears to be a compressed file. Therefore the technical security rating is 21% dangerous, however you should also read the user reviews.
Recommended: Identify iaStor.sys related errors
Important: Some malware disguises itself as iaStor.sys, particularly when not located in the C:\Windows\System32\drivers 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.
A clean and tidy computer is the key requirement for avoiding problems with iaStor. This means running a scan for malware, cleaning your hard drive using 1cleanmgr and 2sfc /scannow, 3uninstalling programs that you no longer need, checking for Autostart programs (using 4msconfig) and enabling Windows' 5Automatic Update. Always remember to perform periodic backups, or at least to set restore points.
Should you experience an actual problem, try to recall the last thing you did, or the last thing you installed before the problem appeared for the first time. Use the 6resmon command to identify the processes that are causing your problem. Even for serious problems, rather than reinstalling Windows, you are better off repairing of your installation or, for Windows 8 and later versions, executing the 7DISM.exe /Online /Cleanup-image /Restorehealth command. This allows you to repair the operating system without losing data.
To help you analyze the iaStor.sys process on your computer, the following programs have proven to be helpful: ASecurity Task Manager displays all running Windows tasks, including embedded hidden processes, such as keyboard and browser monitoring or Autostart entries. A unique security risk rating indicates the likelihood of the process being potential spyware, malware or a Trojan. BMalwarebytes Anti-Malware detects and removes sleeping spyware, adware, Trojans, keyloggers, malware and trackers from your hard drive.