What is pfc?

The genuine pfc.sys file is a software component of Padus ASPI Shell by Padus.
A software development toolkit, the Padus Foundation Class for Windows allows you to create applications and software that interacts and controls your CD and DVD hardware and software. It contains its own ASPI layer and is built in a C/C++ environment. Originally designed for Windows 95 through Windows XP, there is still a degree of support for newer versions of Windows.

PFC stands for Padus Foundation Class

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

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

Pfc.sys file information

The process known as Padus ASPI Shell or Padus R ASPI Shell belongs to software Padus ASPI Shell or Adobe Audition or PADUS ASPI SHELL or MemoriesOnTV by Padus (

Description: Pfc.sys is not essential for the Windows OS and causes relatively few problems. The file pfc.sys is located in the C:\Windows\System32\drivers folder. Known file sizes on Windows 10/8/7/XP are 10,368 bytes (46% of all occurrences), 9,856 bytes and 6 more variants. 
The driver can be started or stopped from Services in the Control Panel or by other programs. The program is not visible. There is no detailed description of this service. The file is not a Windows system file. pfc.sys appears to be a compressed file. Therefore the technical security rating is 39% dangerous, however you should also read the user reviews.

Uninstalling this variant: There is a possibility to do the following:
  1) completely remove Adobe Audition (Control Panel ⇒ Uninstall a Program)
  2) visit the support page
  3) search for an update on the vendor’s website.

Recommended: Identify pfc.sys related errors

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

reading of the pfc.sys in notpad: de junking This program cannot be run in DOS mode. C:\Bonanza\Drivers\Pfc\Driver\Win2KXP\objfre\i386\pfc.pdb \ D e v i c e \ P a s p i 0 \ D o s D e v i c e s \ P a s p i 0 ntoskrnl.exe HAL.dll F i l e V e r s i o n 2 , 5 , 0 , 2 0 1 L e g a l C o p y r i g h t ( C ) P a d u s , I n c ... ntoskrnl.exe and HAL.dll can be fond in system32 you cant load ntoskrnl.exe in win7 coz its 16bit i dont see how Nvidia Video Decoder will need this!
Biggest BS out there along with Adaptec ASPI and SPTD. SPTD will and can stop pc booting. Nothing to do except remove it manualy if can. Or replace with backup 'you have been warned'. All of the above including elaborate bytes elby driver can slow down cd, dvd, blu-ray and bdxl reading and writing. Again you have been warned, sorry for warning but it is important to not. SPTI as installed by microsoft is the best there is. No joking use nothing but that. If need an aspi layer try use nero aspi.dll search for it on nero site it is free. Place it in software folder and it should use it from there, or tell software to use it from there. That is all there is to know for keeping your microsoft os running in perfect health for optical drives. Another thing try get in the habit of unpacking in virtual memory or a sandbox to know the installer contents. Or better still ask your av, malware, trojan etc software company to detect instalation of these device and to notify you so can make decision to install product or not. Doing this will no doubt make those softwares think twice and maybe put a option to install or not, that is allow on os at all. Maybe then they get the idea that SPTI or nero.dll aspi is the best to use. Actualy I don't use nero, I prefer ImgBurn becuase it is better. Use other freeware tools for conversion if need video or audio done. Far faster than relying on nero bloat ware. Scuse if this upsets anyone, better to tell the truth than not to. Dangerous rating because they can stop pc from booting. Also make only coasters and have an optical drive that seems as if it only reads slow, one or all problems can happen.
  Not these drivers on any microsoft os  
It was installed by Nvidia Video Decoder
Installed with Adobe Premiere Pro 7.0 for Windows. 1 Download, unpack and run it with administrator rights, select the pfc filter and click remove, rename or remove \Windows\System32\drivers\pfc.sys or \Windows\SysWOW64\drivers\pfc.sys, Reboot system.
  Peet   (further information)
This was probably installed on my system by Adobe CS4 Design Premium. Windows 7 Pro x64 refuses to run it, giving an error in the System log saying it's incompatible. It doesn't seem to have broken anything however.
Adobe Audition installed it. My dvd-burner lost possibility to burn Philips dvd-rw discs. But now I'm afraid to unistall it, because perhaps Audition will not work anymore.
its a aspi driver for windows xp (32-bit) needed for (virtual) cd/dvd-drives
Crashed my Win XP64 - \SystemRoot\SysWow64\drivers\pfc.sys has been blocked from loading due to incompatibility with this system. Please contact your software vendor for a compatible version of the driver.
  Ooops   (further information)
More comments can be found here:
    (further information)

Rating chart

Summary: Average user rating of pfc.sys: based on 60 votes with 9 reviews. 40 users think pfc.sys is essential for Windows or an installed application. 8 users think it's probably harmless. 10 users think it's neither essential nor dangerous. 2 users suspect danger. 7 users don't grade pfc.sys ("not sure about it").

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Best practices for resolving pfc issues

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

pfc.sys [all]