How to remove the ddccy.dll malware

Most antivirus programs classify ddccy.dll as a harmful extension to Internet Explorer: for instance Trojan:Win32/Conhook.A (detected by Microsoft), and Trojan.Vundo (detected by Symantec). Add-ons like this can display ads, slow down your computer and cause various other errors. If you can't remember installing the associated ddccy.dll 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 ddccy.dll and how to get rid of it.

Click here to automatically remove the ddccy.dll malware

Ddccy.dll file information

Here is some of what is known about the process. Up to now, our technical analysts have not been able to relate it to any particular software.

Description: Ddccy.dll is not essential for Windows and will often cause problems. The ddccy.dll file is located in the C:\Windows\System32 folder. Known file sizes on Windows 10/8/7/XP are 573,492 bytes (10% of all occurrences), 263,220 bytes and 35 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 347C8C7F-CDC2-45F3-A94D-8069B958E384 or D9E8B6F5-FCA0-4EE5-8844-64E5977A193E or 65 more variants. There is no description of the program. The program has no visible window. There is no detailed description of this service. Ddccy.dll is not a Windows core file. The file is an unknown file in the Windows folder. It is able to monitor web browsers. Ddccy.dll is able to monitor applications, manipulate other programs and record keyboard and mouse inputs. Therefore the technical security rating is 92% dangerous.

Recommended: Identify ddccy.dll related errors

If ddccy.dll is located in a subfolder of "C:\Program Files", the security rating is 36% dangerous. The file size is 344,576 bytes. The program has a visible window. The process has no file description. The application starts when Windows starts (see Registry key: Run). It is not a Windows core file. ddccy.dll appears to be a compressed file.

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

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

ddccy.dll [all]