How to remove the commdl virus

Most antivirus programs identify commdl.dll as malware.

The free file information forum can help you find out how to remove it. If you have additional information about this file, please leave a comment or a suggestion for other users.

Click to Run a Free Virus Scan for the commdl.dll malware

Commdl.dll file information

The process known as Alcohol (version 120%) appears to belong to software Alcohol (version 120%) by Alcohol Soft Development Team (

Description: Commdl.dll is not essential for Windows and will often cause problems. The file commdl.dll is located in the C:\Windows\System32 folder. Known file sizes on Windows 10/8/7/XP are 122,368 bytes (20% of all occurrences), 88,064 bytes, 98,048 bytes, 116,480 bytes or 108,260 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 00551959-EC7B-43B9-8BC2-5FAAAF3F51F6 or DABB28C1-B8A6-4070-8A51-F1AA6D0BB443 or 745A57FD-EAF9-4CB3-90B8-406F30B8A2E9 or D1FA1BF5-41DD-4273-B9B8-9E9BF73F9279 or E159CBA5-FC4C-40C5-9C48-2FFBC870EB83. Commdl.dll is located in the Windows folder, but it is not a Windows core file. The program has no visible window. The commdl.dll file is able to monitor web browsers. The service has no detailed description. The file is not a Windows core file. There is no description of the program. Therefore the technical security rating is 88% dangerous.

Recommended: Identify commdl.dll related errors

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


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Best practices for resolving commdl issues

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

commdl.dll [all]