How to remove the Citrix Web Client malware

Most antivirus programs classify ddcya.dll as a harmful extension to Internet Explorer: such as Trojan Horse or Trojan.Vundo (detected by Symantec), and not-a-virus:AdWare.Win32.Virtumonde.hc or not-a-virus:AdWare.Win32.Virtumonde.fl (detected by Kaspersky). Add-ons like this can display ads, slow down your computer and cause various other errors. If you can't remember installing the associated Citrix Web Client 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 Citrix Web Client and how to get rid of it.

Click here to automatically remove the Citrix Web Client malware

Ddcya.dll file information

The process appears to belong to software Citrix Web Client by unknown.

Description: Ddcya.dll is not essential for Windows and will often cause problems. The ddcya.dll file is located in the C:\Windows\System32 folder. Known file sizes on Windows 10/8/7/XP are 280,676 bytes (10% of all occurrences), 263,220 bytes and 26 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 15E57EC8-977A-4A75-AB67-C41C05154EFE or 247307C8-D5FD-494D-9328-DCA5E61D36AA or 40 more variants. There is no file information. The program has no visible window. There is no detailed description of this service. Ddcya.dll is not a Windows core file. It is an unknown file in the Windows folder. It is able to monitor web browsers. Ddcya.dll is able to monitor applications, manipulate other programs and record keyboard and mouse inputs. Therefore the technical security rating is 92% dangerous.

Uninstalling this variant: You have the option to completely remove Citrix Web Client (Control Panel ⇒ Uninstall a Program).

Recommended: Identify ddcya.dll related errors

Important: You should check the ddcya.dll process on your PC to see if it is a threat. If Citrix Web Client 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


Summary: Average user rating of ddcya.dll: based on 1 vote with 1 user comment. One user thinks ddcya.dll is dangerous and recommends removing it.

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Best practices for resolving ddcya issues

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

ddcya.dll [all]