How to remove the Adparatus BHO malware

Some anti-malware programs classify Adparatus.dll as a harmful extension to Internet Explorer: such as Trojan.Generic.6289907 (detected by F-Secure), and TROJ_GEN.R26C2H4 (detected by TrendMicro). Add-ons like this can display ads, slow down your computer and cause various other errors. If you can't remember installing the associated Adparatus BHO software, it's no surprise. In most cases, this kind of adware is installed on the side when you install a freeware product like a Youtube Downloader or a PDF Converter. In the following selection, you can read more about Adparatus BHO and how to get rid of it.

Click here to automatically remove the Adparatus BHO malware

Adparatus.dll file information

The process known as Adparatus BHO belongs to software Adparatus by Market Precision (

Description: Adparatus.dll is not essential for the Windows OS and causes relatively few problems. Adparatus.dll is located in a subfolder of "C:\Program Files". Known file sizes on Windows 10/8/7/XP are 705,232 bytes (50% of all occurrences), 688,128 bytes, 688,848 bytes, 774,144 bytes or 701,136 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 8B2C7C9D-716D-4e9e-9358-B9C80A81B7ED. The program has no visible window. Adparatus.dll is able to change the behavior of, or monitor Internet Explorer. The service has no detailed description. The Adparatus.dll file is not a Windows system file. The file has a digital signature. Adparatus.dll is able to record keyboard and mouse inputs. Therefore the technical security rating is 67% dangerous.

Uninstalling this variant: If you run into problems with Adparatus.dll, you can also safely remove the program using the uninstall program of Adparatus (Control Panel ⇒ Uninstall a Program).

Recommended: Identify Adparatus.dll related errors

Important: Some malware also uses the file name Adparatus.dll, for example Trojan.Generic.6289907 (detected by F-Secure), and TROJ_GEN.R26C2H4 (detected by TrendMicro). Therefore, you should check the Adparatus.dll process on your PC to see if it is a threat. If Adparatus BHO 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.


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Best practices for resolving Adparatus issues

The following programs have also been shown useful for a deeper analysis: ASecurity Task Manager examines the active Adparatus process on your computer and clearly tells you what it is doing. Malwarebytes' well-known Banti-malware tool tells you if the Adparatus.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 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.

Other processes

Adparatus.dll [all]