How to remove the iWon Co-Pilot malware

Most antivirus programs classify iwonbar.dll as a harmful extension to Internet Explorer: for instance not-a-virus:AdWare.Win32.IWon.d (detected by Kaspersky), and Application.Iwon.D (detected by F-Secure). Add-ons like this can display ads, slow down your computer and cause various other errors. If you can't remember installing the associated iWon Co-Pilot 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 iWon Co-Pilot and how to get rid of it.

Click here to automatically remove the iWon Co-Pilot malware

Iwonbar.dll file information

The process known as iWon Co-Pilot belongs to software iWon Co-Pilot for Internet Explorer and Netscape by (

Description: Iwonbar.dll is not essential for Windows and will often cause problems. Iwonbar.dll is located in a subfolder of "C:\Program Files". The file size on Windows 10/8/7/XP is 241,664 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 C298FB42-E3E2-11D3-ADCD-0050DAC24E8F. The program has no visible window. It is able to change the behavior of, or monitor Internet Explorer. Iwonbar.dll is not a Windows system file. Iwonbar.dll is able to record keyboard and mouse inputs. Therefore the technical security rating is 57% dangerous, however you should also read the user reviews.

Recommended: Identify iwonbar.dll related errors

External information from Tony Klein:

Important: You should check the iwonbar.dll process on your PC to see if it is a threat. If iWon Co-Pilot 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 Browser bar. Search through the site. Unknown if it collects info.. see privacy policy
  Matt   (further information)

Summary: Average user rating of iwonbar.dll: based on 1 vote with 1 user comment. One user suspects danger.

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Best practices for resolving iwonbar issues

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

iwonbar.dll [all]