What is csauser.dll?

Csauser.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 csauser.dll is a Windows system file or if it belongs to an application that you can trust.

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Csauser.dll file information

The process known as Cisco Security Agent component or CSA component appears to belong to software unknown by Cisco Systems (

Description: Csauser.dll is not essential for Windows and will often cause problems. Csauser.dll is located in the C:\Windows\System32 folder. Known file sizes on Windows 10/8/7/XP are 147,456 bytes (68% of all occurrences), 77,911 bytes, 110,592 bytes, 389,120 bytes or 419,048 bytes. 
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. There is no file information. The program has no visible window. There is no detailed description of this service. It can change the behavior of other programs or manipulate other programs. The file is not a Windows core file. The process is loaded during the Windows boot process (see Registry key: AppInit_DLLs). Csauser.dll is able to manipulate other programs and record keyboard and mouse inputs. Therefore the technical security rating is 81% dangerous, however you should also read the user reviews.

Recommended: Identify csauser.dll related errors

Important: Some malware camouflages itself as csauser.dll. Therefore, you should check the csauser.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

There is an issue with running Cisco Security Agent and Office 2003 when trying to consume or publish protected content with Microsoft Rights Management Server. The file csauser.dll located in the SystemRoot\System32 folder loads whenever you open an Office Application. Steps to resolve this issue is to stop the CSA client, rename the csauser.dll to csauser.dll.old, then reboot your pc.
Cisco Security Agent component
  AEA   (further information)
Prevents Rational Requisite Pro from launching when installed on a system.
Prevents NuSphere PhpED from starting. This dll intercepts TComFacotory.QueryInterface()

Summary: Average user rating of csauser.dll: based on 3 votes with 4 user comments. One user thinks csauser.dll is essential for Windows or an installed application. One user suspects danger. One user thinks csauser.dll is dangerous and recommends removing it. One user is not sure about it.

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Best practices for resolving csauser issues

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

csauser.dll [all]