What is truecrypt?

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

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

Truecrypt.sys file information

The process known as TrueCrypt Driver belongs to software TrueCrypt by TrueCrypt Foundation (

Description: Truecrypt.sys is not essential for the Windows OS and causes relatively few problems. The file truecrypt.sys is located in the C:\Windows\System32\drivers folder. Known file sizes on Windows 10/8/7/XP are 188,672 bytes (21% of all occurrences), 215,872 bytes and 9 more variants. 
The driver can be started or stopped from Services in the Control Panel or by other programs. The program is not visible. The service has no detailed description. The truecrypt.sys file is not a Windows core file. Truecrypt.sys is certified by a trustworthy company. truecrypt.sys appears to be a compressed file. Therefore the technical security rating is 35% dangerous, however you should also read the user reviews.

Uninstalling this variant: You can uninstall TrueCrypt Foundation, or ask Support team for help. Go to TrueCrypt Foundation in the Windows Control Panel (Software or Programs section) to uninstall it, or go to for Customer Support.

Recommended: Identify truecrypt.sys related errors

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

Cipher software for partitions and images
Treiber des Opensource Projektes "Free open-source disk encryption for Windows XP/2000/2003".
  Brummbaer   (further information)
Required to run TrueCrypt encryption software. Must be present when you mount any hidden (encrypted) partition that you've created using TrueCrypt.
Gehört zur TrueCrypt Verschlüsselungs-Software und wird benötigt, wenn man verschlüsselte Archivdateien öffnen will. Ist völlig harmlos
    (further information)

Summary: Average user rating of truecrypt.sys: based on 4 votes with 4 user comments. 3 users think truecrypt.sys is essential for Windows or an installed application. One user thinks it's probably harmless. One user is not sure about it.

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Best practices for resolving truecrypt issues

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

truecrypt.sys [all]