How to remove the DyFuCA_BH Module malware

Most antivirus programs classify wsem302.dll as a harmful extension to Internet Explorer: such as Adware.NetOptimizer (detected by Symantec), and Adware:Win32/Avenuemedia (detected by Microsoft). Add-ons like this can display ads, slow down your computer and cause various other errors. If you can't remember installing the associated DyFuCA_BH Module 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 DyFuCA_BH Module and how to get rid of it.

Click here to automatically remove the DyFuCA_BH Module malware

Wsem302.dll file information

The process known as DyFuCA_BH Module belongs to software DyFuCA_BH Module by Avenue Media N.V (

Description: Wsem302.dll is not essential for Windows and will often cause problems. Wsem302.dll is located in the C:\Windows folder. The file size on Windows 10/8/7/XP is 63,232 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 8F4E5661-F99E-4B3E-8D85-0EA71C0748E4. The program is not visible. The wsem302.dll file is able to change the behavior of, or monitor Internet Explorer. The file has a digital signature. There is no detailed description of this service. The wsem302.dll file is not a Windows core file. wsem302.dll appears to be a compressed file. Therefore the technical security rating is 62% dangerous, however you should also read the user reviews.

Recommended: Identify wsem302.dll related errors

External information from Tony Klein:

Important: You should check the wsem302.dll process on your PC to see if it is a threat. If DyFuCA_BH Module 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

Part of avenue media browser extension something program. You don't need it.
Linked to Bargain Network and other adware/spyware
  Joel Mellon   (further information)
its a trojan found in the symantec library
can I just remove it from the windows folder without creating too much trouble to my browser functionality?

Summary: Average user rating of wsem302.dll: based on 4 votes with 4 user comments. One user thinks it's neither essential nor dangerous. One user suspects danger. 2 users think wsem302.dll is dangerous and recommend removing it.

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Best practices for resolving wsem302 issues

The following programs have also been shown useful for a deeper analysis: Security Task Manager examines the active wsem302 process on your computer and clearly tells you what it is doing. Malwarebytes' well-known anti-malware tool tells you if the wsem302.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

wsem302.dll [all]