What is IoctlSvc.exe?

The .exe extension on a filename indicates an executable file. Executable files may, in some cases, harm your computer. Therefore, please read below to decide for yourself whether the IoctlSvc.exe on your computer is a Trojan that you should remove, or whether it is a file belonging to the Windows operating system or to a trusted application.

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IoctlSvc.exe file information

Windows Task Manager with IoctlSvc
IoctlSvc.exe process in Windows Task Manager

The process known as PLFlash DeviceIoControl Service belongs to software IoctlSvc Application or Nero 8 Ultra Edition HD or Nero BackItUp (version 2 Essentials) by Prolific Technology (

Description: IoctlSvc.exe is not essential for the Windows OS and causes relatively few problems. IoctlSvc.exe is located in the C:\Windows\System32 folder or sometimes in a subfolder of C:\Windows or in a subfolder of "C:\Program Files". Known file sizes on Windows 10/8/7/XP are 81,920 bytes (86% of all occurrences), 53,248 bytes, 102,400 bytes, 87,344 bytes or 192,512 bytes. 
The program has no visible window. The IoctlSvc.exe file is not a Windows system file. IoctlSvc.exe is located in the Windows folder, but it is not a Windows core file. Therefore the technical security rating is 41% dangerous, however you should also read the user reviews.

Uninstalling this variant: The developer Nero provides a website for help and for updates. There is also an uninstaller (Control Panel ⇒ Uninstall a Program ⇒ Nero or Nero 8 Essentials).

Recommended: Identify IoctlSvc.exe related errors

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

its block from shutdown PC
its useless in winxp Nero did it again, putting an exe that will eventually cause problems. It will eventually try to become the default usb device driver for all usb related processes in win7 home basic, causing system slowdowns nd freezes in certain apps. Like Norton Backup utlities using external drives larger than 500gb. The rechanges are seen by your system as part of the backup process.
  William   (further information)
For your USB flash driver
when starts running pc freeze and have to turn off
Installed with Nero8
I just installed Nero Backit up 4, & plflash just started showing up recently also.
good utility from 2002-03 from Prolific Technologies of Taiwan. Completely unnecessary in WinXP.
  Sam Wastle   (further information)
When it runs I get "no dial tone" on my modem
More comments can be found here:
    (further information)

Rating chart

Summary: Average user rating of IoctlSvc.exe: based on 22 votes with 9 reviews. 9 users think IoctlSvc.exe is essential for Windows or an installed application. 3 users think it's probably harmless. 9 users think it's neither essential nor dangerous. One user suspects danger. 7 users don't grade IoctlSvc.exe ("not sure about it").

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Best practices for resolving IoctlSvc issues

A clean and tidy computer is the key requirement for avoiding problems with IoctlSvc. This means running a scan for malware, cleaning your hard drive using cleanmgr and sfc /scannow, uninstalling programs that you no longer need, checking for Autostart programs (using msconfig) and enabling Windows' Automatic 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 resmon 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 DISM.exe /Online /Cleanup-image /Restorehealth command. This allows you to repair the operating system without losing data.

To help you analyze the IoctlSvc.exe process on your computer, the following programs have proven to be helpful: Security 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. Malwarebytes Anti-Malware detects and removes sleeping spyware, adware, Trojans, keyloggers, malware and trackers from your hard drive.

Other processes

IoctlSvc.exe [all]