What is acedrv09?

Acedrv09.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 acedrv09.sys is a Windows system file or if it belongs to an application that you can trust.

Run a free scan to check for acedrv09 drivers in need of updating

Acedrv09.sys file information

The process known as Filter Driver ProtectDisc or acedrv09 belongs to software acedrv09 by Protect Software GmbH (

Description: Acedrv09.sys is not essential for Windows and will often cause problems. Acedrv09.sys is located in the C:\Windows\System32\drivers folder. Known file sizes on Windows 10/8/7/XP are 110,304 bytes (91% of all occurrences) or 373,568 bytes. 
The driver can be started or stopped from Services in the Control Panel or by other programs. There is no information about the author of the file. The program is not visible. The file has a digital signature. There is no detailed description of this service. It is not a Windows core file. acedrv09.sys appears to be a compressed file. Therefore the technical security rating is 40% dangerous, however you should also read the user reviews.

Uninstalling this variant: The software publisher Movieid provides direct support ( You could uninstall the program using the Control Panel ⇒ Uninstall a ProgramProtect Software GmbH.

Recommended: Identify acedrv09.sys related errors

Important: Some malware camouflages itself as acedrv09.sys. Therefore, you should check the acedrv09.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

Diese Datei ist NICHT von der Firma Microsoft und NICHT ein Bestandteil des Betriebsystems VISTA
  RSIT   (further information)
Handelt sich scheinbar um einen Bestandteil des Kopierschutzes ProtectDisk
  Robbö   (further information)
Causes system to Blue Screen randomly.
It is owned by Protect Software GMBH, a German software company. You can access driver updates at their website at Select "Support" and "End-User-Support". There you will see the file "Driver_Updater.exe". Installing that should take care of the problem
  NetteinChi   (further information)

Summary: Average user rating of acedrv09.sys: based on 3 votes with 4 user comments. One user thinks it's probably harmless. One user thinks it's neither essential nor dangerous. One user suspects danger. One user is not sure about it.

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Best practices for resolving acedrv09 issues

A clean and tidy computer is the key requirement for avoiding problems with acedrv09. 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 acedrv09.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

acedrv09.sys [all]