What is comcasttoolbar.dll?

Comcasttoolbar.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 Comcast Toolbar from

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Comcasttoolbar.dll file information

The process known as Comcast Toolbar from or Comcast Toolbar belongs to software Comcast Toolbar by Comcast Cable Communications (

Description: Comcasttoolbar.dll is not essential for the Windows OS and causes relatively few problems. Comcasttoolbar.dll is located in a subfolder of "C:\Program Files". Known file sizes on Windows 10/8/7/XP are 1,821,184 bytes (91% of all occurrences), 1,799,680 bytes or 1,281,536 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 4E7BD74F-2B8D-469E-93BE-BE2DF4D9AE29. The program is not visible. The file is able to change the behavior of, or monitor Internet Explorer. The service has no detailed description. It is not a Windows core file. Comcasttoolbar.dll is able to record keyboard and mouse inputs. Therefore the technical security rating is 64% dangerous, however you should also read the user reviews.

Uninstalling this variant: If you are having problems with comcasttoolbar.dll, you may want to uninstall Comcast Toolbar from your computer using the Control Panel applet Uninstall a Program.

Recommended: Identify comcasttoolbar.dll related errors

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

It is for the users on the Comcast Network
  Rick   (further information)
takes up memory, but comes with its own spyware scanner, just use a pure scanner and delete this, it is a waste of memory.
i need one on my computer
  Brandy Jackson  
its installed with comcast internet adaware says its ok so does xoftspyxe and norton 360

Rating chart

Summary: Average user rating of comcasttoolbar.dll: based on 8 votes with 4 user comments. 3 users think comcasttoolbar.dll is essential for Windows or an installed application. 3 users think it's probably harmless. 2 users think it's neither essential nor dangerous.

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Best practices for resolving comcasttoolbar issues

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

comcasttoolbar.dll [all]