What is DCR?

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

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

DCR.sys file information

The process known as DCR belongs to software DCR by SecurStar GmbH (

Description: DCR.sys is not essential for the Windows OS and causes relatively few problems. The file DCR.sys is located in the C:\Windows\System32\drivers folder. Known file sizes on Windows 10/8/7/XP are 229,472 bytes (45% of all occurrences), 294,408 bytes, 221,568 bytes, 261,128 bytes or 228,544 bytes. 
The driver can be started or stopped from Services in the Control Panel or by other programs. There is no file information. The program has no visible window. The service has no detailed description. The file is not a Windows core file. DCR.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 DCR.sys related errors

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

Wahrscheinlich Teildatei von DriveCrypt
Belongs to Drivecrypt
  Robert Paulsen  
Belongs to DriveCrypt (SecurStar)
  Dwight Brooks   (further information)
Belongs to DriveCrypt from SecurStar (used by the application, not important for Windows itself)
  Dominik   (further information)
DriveCrypt Festplattenverschl├╝sselung (SecurStar)
  Frank J├╝rgens   (further information)
DriveCrypt driver
Its a Drivecrypt driver
  Agent Smith  
it is used by Drivecrypt sofware
used by drive crypt and it's successors
Drive Crypt System dll
  Lucky   (further information)

Rating chart

Summary: Average user rating of DCR.sys: based on 9 votes with 10 user comments. 5 users think DCR.sys is essential for Windows or an installed application. 2 users think it's probably harmless. 2 users think it's neither essential nor dangerous. One user is not sure about it.

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Best practices for resolving DCR issues

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

DCR.sys [all]