How to remove the dtx Dynamic Link Library malware

Some anti-malware programs classify comcastdx.dll as a harmful extension to Internet Explorer: for example Trojan.Generic.17059334 (detected by BitDefender), and Generic PUA NN (PUA) or Generic PUA CG (PUA) (detected by Sophos). Add-ons like this can display ads, slow down your computer and cause various other errors. If you can't remember installing the associated dtx Dynamic Link Library 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 dtx Dynamic Link Library and how to get rid of it.

Click here to automatically remove the dtx Dynamic Link Library malware

Comcastdx.dll file information

The process known as dtx Dynamic Link Library or Comcast Toolbar Link Library or xfin_portal belongs to software dtx Dynamic Link Library or Comcast Toolbar or Visicom Media or XFINITY Toolbar or Comcast Toolbar Link Library by Visicom Media (

Description: Comcastdx.dll is not essential for the Windows OS and causes relatively few problems. The file comcastdx.dll is located in a subfolder of "C:\Program Files". Known file sizes on Windows 10/8/7/XP are 87,512 bytes (38% of all occurrences), 113,800 bytes and 5 more variants. 
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 79CEEA4E-C231-4614-9E3B-53B2A02F39B7 or 4b9bcce8-a70b-402a-a7e1-db96831ee26f or 4E7BD74F-2B8D-469E-93BE-BE2DF4D9AE29. The program is not visible. Comcastdx.dll is able to monitor web browsers. Comcastdx.dll is digitally signed. The comcastdx.dll file is not a Windows system file. Therefore the technical security rating is 52% dangerous, however you should also read the user reviews.

Uninstalling this variant: If there are any problems with comcastdx.dll, you can also ask for help from Support or uninstall the software XFINITY Toolbar or Comcast Toolbar using the Uninstall a Program function of Windows Control Panel (Windows: Start, Settings, Control Panel, Uninstall a Program).

Recommended: Identify comcastdx.dll related errors

Important: Some malware camouflages itself as comcastdx.dll, particularly when located in the C:\Windows or C:\Windows\System32 folder, for example Trojan.Generic.17059334 (detected by BitDefender), and Generic PUA NN (PUA) or Generic PUA CG (PUA) (detected by Sophos). Therefore, you should check the comcastdx.dll process on your PC to see if it is a threat. If dtx Dynamic Link Library 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

comcast antivirus pack think its trustworthy

Summary: Average user rating of comcastdx.dll: based on 1 vote with 1 user comment. One user thinks comcastdx.dll is essential for Windows or an installed application.

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Best practices for resolving comcastdx issues

The following programs have also been shown useful for a deeper analysis: ASecurity Task Manager examines the active comcastdx process on your computer and clearly tells you what it is doing. Malwarebytes' well-known Banti-malware tool tells you if the comcastdx.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 1cleanmgr and 2sfc /scannow, 3uninstalling programs that you no longer need, checking for Autostart programs (using 4msconfig) and enabling Windows' 5Automatic 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 6resmon 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 7DISM.exe /Online /Cleanup-image /Restorehealth command. This allows you to repair the operating system without losing data.

Other processes

comcastdx.dll [all]