What is cdac15ba?

The genuine cdac15ba.sys file is a software component of Macrovision Security Driver by Macrovision Europe.
A kernel level CD-protecting driver file, this process enforces licensing information for Macrovision. It is associated with various Macrovision products, notably Mathcad. It ensures that copyrights owned by Macrovision are not violated through copying of copyrighted content.

CDAC15ba stands for CD-ROM Advanced Copy Protection version 15 ba

Cdac15ba.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 cdac15ba.sys is a Windows system file or if it belongs to an application that you can trust.

Run a free scan to check for cdac15ba drivers in need of updating

Cdac15ba.sys file information

The process known as CdaC15BA or Macrovision SECURITY Driver belongs to software CdaC15BA or Security Windows NT by Macrovision Europe (

Description: Cdac15ba.sys is not essential for Windows and will often cause problems. Cdac15ba.sys is located in the C:\Windows\System32\drivers folder. Known file sizes on Windows 10/8/7/XP are 8,864 bytes (56% of all occurrences), 11,376 bytes or 12,464 bytes. 
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. The file is not a Windows core file. There is no information about the author of the file. cdac15ba.sys appears to be a compressed file. Therefore the technical security rating is 51% dangerous, however you should also read the user reviews.

Recommended: Identify cdac15ba.sys related errors

Important: Some malware camouflages itself as cdac15ba.sys. Therefore, you should check the cdac15ba.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

Probably a Macromedia Security driver according to the site at the link below.
  R.Lanier   (further information)
it is part of cdilla cd-protecting and starts as a xp-service
Has to do with C-Dilla: to disable you copying other CD's
  Dirk VH  
Left behind by C-Dilla
  Nick V.   (further information)
Macrovision SECURITY Driver
  Monte Staples  
I deleted it. No Prob`s scince 2 Years. Although deleted. dit.* and CdaC11BA.exe
Appears to be built in to 64bit XP. You might be able to disable it in Device Manager when you choose "Show hidden devices".
Macrovision security driver
Spyware,Macrovision,TurboTax,MechWarrior/Paks. Related to C-Dilla must be disabled in Adminastrative tools and services before you can remove it completely
  Marco :P  
In Windows7 CdaC15BA.sys was blocked from loading due to incompatibility with the system, thus did not appear in services to be disabled. So I disabled it in registry: HKLM/SYSTEM/CurrentControlSet/services/CdaC15BA/ by changing the "Start" REG_DWORD from 2 to 3. Thus it is now ignored by the OS and since it did not load anyway this gets rid of the Event Log error messages.
  Paul B  

Rating chart

Summary: Average user rating of cdac15ba.sys: based on 10 votes with 10 user comments. One user thinks cdac15ba.sys is essential for Windows or an installed application. One user thinks it's probably harmless. 4 users think it's neither essential nor dangerous. 4 users suspect danger. 2 users don't grade cdac15ba.sys ("not sure about it").

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Best practices for resolving cdac15ba issues

A clean and tidy computer is the key requirement for avoiding problems with cdac15ba. 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 cdac15ba.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

cdac15ba.sys [all]