What is 12popup.dll?

The genuine 12popup.dll file is a software component of 12Ghosts Popup-Killer by 12Ghosts.
12popup.dll is a DLL (Dynamic Link Library) file that belongs to 12Ghosts Popup-Killer, an extension for Internet Explorer that blocks popups and advertising. DLL files store data, code and resources needed by one or more programs in order to function correctly. This file is a BHO (Browser Helper Object) designed to add functionality and services to Internet Explorer and is required by 12Ghosts Popup-Killer to function correctly. To safely remove this file, simply uninstall the program. 12Ghosts is a German company that develops and distributes utility software designed specifically for the Windows platform. The company was established in 1993 and is headquartered in Pinneberg, Germany.

12Popup stands for 12Ghosts Popup-Killer

12popup.dll is a browser extension for Internet Explorer. This add-on enables several additional functions for Internet Explorer. You can disable it through the Extras menu (key combination Alt + X) under Manage Add-ons. The following paragraph provides more information about 12Ghosts Popup-Killer.

Click to Run a Free Scan for 12popup.dll related errors

12popup.dll file information

The process known as 12Ghosts Popup-Killer - Eradicate pop-ups and pop-unders root and branch belongs to software 12Ghosts Popup-Killer by 12Ghosts Inc. - (

Description: 12popup.dll is not essential for the Windows OS and causes relatively few problems. 12popup.dll is located in a subfolder of "C:\Program Files". Known file sizes on Windows 10/8/7/XP are 68,608 bytes (42% of all occurrences), 69,120 bytes, 54,272 bytes, 59,392 bytes or 45,568 bytes. 
This .dll file is a Browser Helper Object (BHO) that runs automatically every time you start your web browser. BHOs are not stopped by personal firewalls, because they are identified by the firewall as part of the browser itself. BHOs are often used by adware and spyware. IDs used by this BHO include 00000000-0007-5041-4354-0020e48020af. The program has no visible window. It is able to change the behavior of, or monitor Internet Explorer. There is no detailed description of this service. The 12popup.dll file is not a Windows system file. 12popup.dll is able to record keyboard and mouse inputs and monitor applications. Therefore the technical security rating is 66% dangerous, however you should also read the user reviews.

Uninstalling this variant: It is possible to completely remove 12G-Complete or 12Ghosts (Control Panel ⇒ Uninstall a Program).

Recommended: Identify 12popup.dll related errors

External information from Tony Klein:

Important: Some malware camouflages itself as 12popup.dll, particularly when located in the C:\Windows or C:\Windows\System32 folder. Therefore, you should check the 12popup.dll process on your PC to see if it is a threat. If 12Ghosts Popup-Killer has changed your browser's search engine and start page, you can recover your browser's default settings as follows:

Reset default browser settings for Internet-Explorer ▾
  1. In Internet Explorer, press the key combination Alt + X to open the Tools menu.
  2. Click Internet options.
  3. Click the Advanced tab.
  4. Click the Reset... button.
  5. Enable the Delete personal settings option.
This will reset your Internet Explorer to its default settings. Your browser will start with the familiar start page and search engine—without popups, ads, cookies, but all browser add-ons are deleted too [1]. Make cleaning up your browser and your computer simpler and safer with Security Task Manager.


User Comments

It's a popup blocker program
  Jay Jennings  
It kills popups.
  Jan Conradt  

Summary: Average user rating of 12popup.dll: based on 4 votes with 2 user comments. 3 users think 12popup.dll is essential for Windows or an installed application. One user thinks it's probably harmless.

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Best practices for resolving 12popup issues

The following programs have also been shown useful for a deeper analysis: Security Task Manager examines the active 12popup process on your computer and clearly tells you what it is doing. Malwarebytes' well-known anti-malware tool tells you if the 12popup.dll on your computer displays annoying ads, slowing it down. This type of unwanted adware program is not considered by some antivirus software to be a virus and is therefore not marked for cleanup.

A clean and tidy computer is the key requirement for avoiding PC trouble. 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.

Other processes

12popup.dll [all]