What is WinNB57.dll?

WinNB57.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 NN_Bar Module.

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WinNB57.dll file information

The process known as NN_Bar Module or REV06 or REV07 belongs to software NN_Bar Module or MBar IES AFF ATD by unknown.

Description: WinNB57.dll is not essential for Windows and will often cause problems. WinNB57.dll is located in the C:\Windows\System32 folder. Known file sizes on Windows 10/8/7/XP are 303,104 bytes (55% of all occurrences), 311,296 bytes or 385,024 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 9A9C9B69-F908-4AAB-8D0C-10EA8997F37E. The application has no file description. The program has no visible window. The file is an unknown file in the Windows folder. It is able to monitor web browsers. It is not a Windows core file. WinNB57.dll is able to record keyboard and mouse inputs. Therefore the technical security rating is 65% dangerous, however you should also read the user reviews.

Recommended: Identify WinNB57.dll related errors

External information from Tony Klein:

Important: Some malware camouflages itself as WinNB57.dll. Therefore, you should check the WinNB57.dll process on your PC to see if it is a threat. If NN_Bar 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

Adware. Eliminate with extreme prejudice.
  John R Zale  
Browser monitor, part of a Zeno campaign.
  fffy   (further information)

Summary: Average user rating of WinNB57.dll: based on 5 votes with 3 user comments. One user thinks it's neither essential nor dangerous. One user suspects danger. 3 users think WinNB57.dll is dangerous and recommend removing it.

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Best practices for resolving WinNB57 issues

The following programs have also been shown useful for a deeper analysis: Security Task Manager examines the active WinNB57 process on your computer and clearly tells you what it is doing. Malwarebytes' well-known anti-malware tool tells you if the WinNB57.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

WinNB57.dll [all]