What is cdantsrv.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 cdantsrv.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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Cdantsrv.exe file information

Windows Task Manager with cdantsrv
Cdantsrv.exe process in Windows Task Manager

The process known as C-Dilla RTS Service belongs to software CD-Secure/CD-Compress Windows NT or C-DillaSrv by C-Dilla (

Description: Cdantsrv.exe is not essential for Windows and will often cause problems. Cdantsrv.exe is located in the C:\Windows\System32\drivers folder. Known file sizes on Windows 10/8/7/XP are 32,256 bytes (75% of all occurrences), 46,080 bytes, 19,456 bytes or 32,768 bytes. 
The program is not visible. The file is not a Windows core file. Cdantsrv.exe is located in the Windows folder, but it is not a Windows core file. Therefore the technical security rating is 51% dangerous, however you should also read the user reviews.

Recommended: Identify cdantsrv.exe related errors

External information from Paul Collins:

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

Autodesk Licence server
If it verifies copyright appropriateness, it has failed its mission. Does it recognize backups? NOOOOO! Does it recognize a trial use? NOOOOO! Does it cause problems? YEEEEES
  If they can't iden  
Needed to run some programs, for instance the Oxford English Dictionary. Anti piracy program
comes with C-DILLA, installs without permision = SPYWARE.... can't delet
I was at work today and had to install our copy of adobe creative suite cs2 onto my laptop. After install a number of my software apps failed, such as eudora, Virtual daemon manager, mailwasher, norton antivirus, peer guardian and sunbelt kerio firewall etc
  Lawrence Finn  
I have never installed any CAD program. I always found a new dialer after surfing with this service running. Stopped/deleted, and no problems. Suspicious.
License manager for Oxford English Dictionary 2nd Ed
Came with Encyclopaedia Universalis. Tries to connect to the Web without asking for permission = Spyware. Modifies "unused" sectors in boot cluster. My Bit Defender 8 Pro's firewall had been destroyed, by C-Dilla?
More comments can be found here:
    (further information)

Rating chart

Summary: Average user rating of cdantsrv.exe: based on 46 votes with 9 reviews. 23 users think cdantsrv.exe is essential for Windows or an installed application. 5 users think it's probably harmless. 5 users think it's neither essential nor dangerous. 4 users suspect danger. 9 users think cdantsrv.exe is dangerous and recommend removing it. 7 users don't grade cdantsrv.exe ("not sure about it").

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Best practices for resolving cdantsrv issues

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

cdantsrv.exe [all]