What is Aspi32?

The genuine Aspi32.sys file is a software component of Adaptec's ASPI Layer by Adaptec.
Aspi32.sys is a kernel driver that belongs to Adaptec's ASPI Layer, a programming interface that simplifies communications via the computer bus between a driver module and hardware peripherals. A kernel driver works directly with the operating system and hence needs to function in a very stable environment. Removing this driver may result in the application not being able to function correctly. ASPI was conceived by Adaptec and developed in 1990. It was originally created for DOS, OS/2, Windows 3.x, and Novell NetWare. It was designed to support SCSI devices (a set of standards for parallel interfaces) while support for ATAPI devices arrived later. Adaptec was an American company that developed computer storage products until 2010, when it was acquired by PMC-Sierra. Adaptec was founded by Larry Boucher in 1981 and originally focused on devices with SCSI interfaces. The company produced interface products that include SCSI, USB, IEEE 1394, iSCSI, Fibre Channel, and video. The company was based in Sunnyvale, California, USA.

ASPI32 stands for ASPI (Advanced SCSI Programming Interface) Kernel Driver for Windows (32-bit)

Aspi32.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 Aspi32.sys is a Windows system file or if it belongs to an application that you can trust.

Run a free scan to check for Aspi32 drivers in need of updating

Aspi32.sys file information

The process known as ASPI for WIN32 Kernel Driver belongs to software Adaptec's ASPI Layer or EZ-SCSI by Adaptec (

Description: Aspi32.sys is not essential for the Windows OS and causes relatively few problems. Aspi32.sys is located in the C:\Windows\System32\drivers folder. Known file sizes on Windows 10/8/7/XP are 25,244 bytes (32% of all occurrences), 16,512 bytes and 6 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. Aspi32.sys is not a Windows system file. Aspi32.sys appears to be a compressed file. Therefore the technical security rating is 39% dangerous; however you should also read the user reviews.

Recommended: Identify Aspi32.sys related errors

Important: Some malware disguises itself as Aspi32.sys, particularly when not located in the C:\Windows\System32\drivers folder. Therefore, you should check the Aspi32.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.


User Comments

ASPI driver
  Georg   (further information)
data miner, delete right away !
Its WINASPI Driver. Description - ASPI provides a pass-through interface between the two main components of a software driver: a manger that is written to specific host adapter hardware and a device module or application that is tailored to particular peripheral. SCSI device driver modules and applications submit I/O requests to the host adapter, independent of the SCSI host adapter type. An ASPI manager handles and manages multiple I/O requests from multiple ASPI device driver modules or applications.
  Adaptec   (further information)
driver ez-scsi for S.O. =win98
  stefralusi   (further information)
When installed in %system%\drivers, it is from adaptec
caused disc dump program to crash completely
Aspi32 sys shows a problem on Dell crash analysis tool.
  Robert garland  
my file is missing
this is absolutely from adaptec
Seems to be deprecated in Windows versions since Vista
  Brandon Taylor  

Rating chart

Summary: Average user rating of Aspi32.sys: based on 14 votes with 10 user comments. 9 users think Aspi32.sys is essential for Windows or an installed application. 4 users think it's neither essential nor dangerous. One user thinks Aspi32.sys is dangerous and recommends removing it. 3 users don't grade Aspi32.sys ("not sure about it").

Do you have additional information?
What do you know about Aspi32.sys:
How would you rate it:
Link for more info:
Your Name:

Best practices for resolving Aspi32 issues

A clean and tidy computer is the key requirement for avoiding problems with Aspi32. 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 Aspi32.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.

Other processes

Aspi32.sys [all]