What is avcuf32.dll?

Avcuf32.dll is a Windows DLL file. DLL is the abbreviation for Dynamic Link Library. DLL files are needed by programs or web browser extensions, because they contain program code, data, and resources. The following information can help you determine if avcuf32.dll is a Windows system file or if it belongs to an application that you can trust.

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Avcuf32.dll file information

The process known as BitDefender Active Virus Control Usermode Filtering Library

belongs to software Bitdefender Total Security (version 2015, 2013, 2012, 2016) or Bitdefender Antivirus Free Edition or Bitdefender Internet Security (version 2013, 2015, 2012, 2016) or Bitdefender Antivirus Plus (version 2013, 2012, 2015, 2016) or BitDefender AntiVirus or Bitdefender Windows (version 8 Security) or Ultimate Protection Plan or Fujitsu Internet Security (version 2013)

by BitDefender S.R.L. Bucharest, ROMANIA (

Description: Avcuf32.dll is not essential for the Windows OS and causes relatively few problems. The file avcuf32.dll is located in a subfolder of "C:\Program Files" or sometimes in a subfolder of the user's profile folder. Known file sizes on Windows 10/8/7/XP are 801,704 bytes (21% of all occurrences), 497,848 bytes and 27 more variants. 
A .dll file (Dynamic Link Library) is a special type of Windows program containing functions that other programs can call. This .dll file can be injected to all running processes and can change or manipulate their behavior. It can change the behavior of other programs or manipulate other programs. The program has no visible window. The file has a digital signature. There is no detailed description of this service. It is not a Windows system file. The file is a Verisign signed file. Avcuf32.dll is able to record keyboard and mouse inputs, manipulate other programs, monitor applications and connect to the Internet. Therefore the technical security rating is 44% dangerous; however you should also read the user reviews.

Uninstalling this variant: If you encounter difficulties with avcuf32.dll, you can also remove the entire program Bitdefender Total Security 2013 or Bitdefender Total Security 2015 using Windows Control Panel.

Recommended: Identify avcuf32.dll related errors

Important: Some malware camouflages itself as avcuf32.dll, particularly when located in the C:\Windows or C:\Windows\System32 folder. Therefore, you should check the avcuf32.dll 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

This is a part of BitDefender system

Summary: Average user rating of avcuf32.dll: based on 2 votes with 1 user comment. 2 users think avcuf32.dll is essential for Windows or an installed application.

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Best practices for resolving avcuf32 issues

A clean and tidy computer is the key requirement for avoiding problems with avcuf32. 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 avcuf32.dll 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

avcuf32.dll [all]