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What is sptd?

Sptd.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 sptd.sys belonging to the Windows system or an application you can trust.

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

Sptd.sys file information

The process known as sptd or SCSI Pass Through Direct Host belongs to software sptd or SCSI Pass Through Direct by Duplex Secure.

Description: Sptd.sys is not essential for Windows and will often cause problems. sptd.sys is located in the folder C:\Windows\System32\drivers. Known file sizes on Windows 7/XP are 642,560 bytes (19% of all occurrences), 685,816 bytes and 25 more variants. http://www.file.net/process/sptd.sys.html 
The driver can be started or stopped from Services in the Control Panel or by other programs. The program has no visible window. There is no detailed description of this service. It is not a Windows system file. The file is a file without information about the developer of this file. Therefore the technical security rating is 53% dangerous, however also read the users reviews.

Recommended: Identify sptd.sys related errors

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

Starburn free burning install it too. This is a tool for burning.
  Colpix   (further information)
RootkitRevealer detects sptd.sys when run; AVG 2014 detects other variants of it as a rootkit. It hasn't caused me a problem on XP, I have DAEMON tools lite installed. So, this is where the pest came from. I'm not sure what to do with it at the moment, as a registry mis-edit could crash my computer upon re-boot or make the computer totally unusable.
AVG warns as rootkit so to disable: http://www.duplexsecure.com/en/faq
  Laurence Smith   (further information)
It is a safe file however in some cases it can cause problems and give BSOD, easiest fix as it is NOT an essential driver is to search for the file and just delete it, this eill solve the BSOD problems
after deinstalling Damon Tools the file persists. Avira can't open it.
Daemon Tools - Scsi Pass Through Direct (sptd.sys) driver
Not harmful. It keeps rebooting my system and freezing in safe mode.
Spdt shows up in a Root Kit Revealer as a zero length key and denies access to the Cfg registry key. This what caused me concern. I'm sure that it was installed with Alcohol 120%. So far I don't believe that it has caused me any problems. There is alot of conflicting discussion about this process.
More comments can be found here:
    (further information)

Rating chart

Summary: Average user rating of sptd.sys: based on 176 votes with 9 reviews.
71 users think sptd.sys is essential for Windows or an installed application. 13 users think it's probably harmless. 36 users think it's neither essential nor dangerous. 37 users suspect danger. 19 users think sptd.sys is dangerous and recommend removing it. 12 users don't grade sptd.sys ("not sure about it").

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Sptd scanner

Security Task Manager shows all running Windows tasks including embedded hidden functions (e.g. keyboard or browser monitoring, autostart entry). A unique security risk rating indicates the likelihood of the process being potential spyware, malware, keylogger or a Trojan.

Malwarebytes Anti-Malware detects and removes sleeping spyware, adware, trojans, keyloggers, malware and tracking threats from your hard disk. Ideal supplement to Security Task Manager.

SpeedUpMyPC scans, cleans, repairs and optimizes your computer.

Other processes

sptd.sys [all]