What is CbFsMntNtf3.dll?

The genuine CbFsMntNtf3.dll file is a software component of Callback File System by EldoS.
This dynamic link library starts with Windows and supports the Callback File System application. A software development kit for Windows, Callback File System is a program that allows you to set up virtual file systems across a network or cloud and treat the drives as if they are local. As long as Callback File System is running, these virtual drives will function as any other file system on your system. Founded in 1998, EldoS is a software corporation that focuses on security applications.

CbFSMntNtf3 stands for Callback File System Mount Notifier 3

CbFsMntNtf3.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 CbFs Mount Notifier.

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CbFsMntNtf3.dll file information

The process known as CbFs Mount Notifier belongs to software Callback File System by EldoS (

Description: CbFsMntNtf3.dll is not essential for the Windows OS and causes relatively few problems. The CbFsMntNtf3.dll file is located in a subfolder of C:\Windows. Known file sizes on Windows 10/8/7/XP are 158,224 bytes (73% of all occurrences), 155,416 bytes or 158,056 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 5FF49FE8-B332-4CB9-B102-FB6951629E55. CbFsMntNtf3.dll is certified by a trustworthy company. The CbFsMntNtf3.dll file is not a Windows core file. The process is loaded during the Windows boot process (see Registry key: ShellServiceObjectDelayLoad). The program is not visible. Therefore the technical security rating is 45% dangerous, however you should also read the user reviews.

Uninstalling this variant: You can uninstall EldoS Corporation, or try to get help from the software vendor. Click on EldoS Corporation in the Windows Control Panel (Software or Programs section) to uninstall it, or click on to visit the vendor's website.

Recommended: Identify CbFsMntNtf3.dll related errors

If CbFsMntNtf3.dll is located in the C:\Windows\System32 folder, the security rating is 54% dangerous. The file size is 155,416 bytes (51% of all occurrences), 158,224 bytes or 158,056 bytes. The program is not visible. The file has a digital signature. CbFsMntNtf3.dll is not a Windows core file. The CbFsMntNtf3.dll file is able to change the behavior of, or monitor Internet Explorer. The software is loaded during the Windows boot process (see Registry key: ShellServiceObjectDelayLoad).

Important: Some malware camouflages itself as CbFsMntNtf3.dll, particularly when located in the C:\Windows or C:\Windows\System32 folder. Therefore, you should check the CbFsMntNtf3.dll process on your PC to see if it is a threat. If CbFs Mount Notifier 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

Eldos Callback Filesystem. Basically lets programs mount remote filesystems/storage as if they were local disks. I forget exactly when I installed this, but it's likely correlated with SugarSync, Dropbox, or Wuala - I have all three of those.
  Wireball   (further information)
I'm not 100% shure, but it is for WUALA.
Installed with iPhone explorer
  Terry Mullins   (further information)

Summary: Average user rating of CbFsMntNtf3.dll: based on 3 votes with 3 user comments. 2 users think CbFsMntNtf3.dll is essential for Windows or an installed application. One user thinks it's probably harmless.

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Best practices for resolving CbFsMntNtf3 issues

The following programs have also been shown useful for a deeper analysis: Security Task Manager examines the active CbFsMntNtf3 process on your computer and clearly tells you what it is doing. Malwarebytes' well-known anti-malware tool tells you if the CbFsMntNtf3.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

CbFsMntNtf3.dll [all]