What is op_shell.dll?

The genuine op_shell.dll file is a software component of Agnitum Outpost Firewall Pro by Agnitum.
Op_shell.dll is a DLL (Dynamic Link Library) file that is part of Agnitum Outpost Firewall Pro, a security software that provides a secure firewall and protects systems from incoming targeted attacks. DLL files store data, code and resources needed by one or more programs in order to function correctly. This is not a critical Windows component and should be removed if known to cause problems. Agnitum Outpost Firewall Pro features filtering network traffic and provides protection from various kinds of threats such as hackers, data leaks, malware, etc. The program also blacklists malicious websites, blocks harmful content and automatically encrypts IDs and passwords. Agnitum Ltd is a Russian company that develops security solutions for Windows users. The company started off in 1990 by creating anti-trojan and monitoring solutions for home users. It has currently ventured into personal firewall and Internet security with Outpost Firewall Pro as its flagship product. Agnitum is headquartered in St. Petersburg, Russia.

op_shell stands for Outpost Shell Handler

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

Click to Run a Free Scan for op_shell.dll related errors

Op_shell.dll file information

The process known as Outpost Shell Extension belongs to software Agnitum Outpost Firewall Pro by Agnitum (

Description: Op_shell.dll is not essential for the Windows OS and causes relatively few problems. Op_shell.dll is located in a subfolder of "C:\Program Files". Known file sizes on Windows 10/8/7/XP are 155,648 bytes (28% of all occurrences), 266,176 bytes and 4 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. The program is not visible. The service has no detailed description. It can change the behavior of other programs or manipulate other programs. Op_shell.dll is not a Windows core file. The op_shell.dll file is a Verisign signed file. The file has a digital signature. Therefore the technical security rating is 48% dangerous, however you should also read the user reviews.

Uninstalling this variant: The software vendor offers the option to do the following:
  1) remove the entire program Outpost AntiVirus Service or Agnitum Outpost Firewall Pro using Windows Control Panel
  2) go to the support area of the Agnitum website.

Recommended: Identify op_shell.dll related errors

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

Plugin to Outpost Firewall
Agnitum Outpost module
  Denis   (further information)

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

Do you have additional information? Help other users!
What do you know about op_shell.dll:
How would you rate it:
Link for more info:
Your Name:

Best practices for resolving op_shell issues

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

op_shell.dll [all]