What is netdde.exe?

The .exe extension on a filename indicates an executable file. Executable files may, in some cases, harm your computer. Therefore, please read below to decide for yourself whether the netdde.exe on your computer is a Trojan that you should remove, or whether it is a file belonging to the Windows operating system or to a trusted application.

Click to Run a Free Scan for netdde.exe related errors

Netdde.exe file information

Windows Task Manager with netdde
Netdde.exe process in Windows Task Manager

The process known as Network DDE - DDE Communication or DDE Réseau - Communication DDE belongs to software Microsoft Windows Operating System or Système d'exploitation Microsoft Windows or Outerinfo by Microsoft (

Description: The original netdde.exe from Microsoft is an important part of Windows, but often causes problems. The file netdde.exe is located in the C:\Windows\System32 folder. Known file sizes on Windows 10/8/7/XP are 111,104 bytes (64% of all occurrences), 114,176 bytes and 4 more variants. 
The netdde.exe file is a Windows core system file. The program has no visible window. It is a Microsoft signed file. Therefore the technical security rating is 6% dangerous; however you should also read the user reviews.

Recommended: Identify netdde.exe related errors

Viruses with the same file name

Is netdde.exe a virus? No, it is not. The true netdde.exe file is a safe Microsoft Windows system process, called "Network DDE". However, writers of malware programs, such as viruses, worms, and Trojans deliberately give their processes the same file name to escape detection. Viruses with the same file name are such as PE_Generic (detected by TrendMicro), and PWS:Win32/Prast!rts (detected by Microsoft).
To ensure that no rogue netdde.exe is running on your PC, click here to run a Free Malware Scan.

How to recognize suspicious variants? If netdde.exe is located in a subfolder of C:\Windows\System32, the security rating is 100% dangerous. The file size is 594,804 bytes. There is no description of the program. The program is not visible. It is not a Windows core file. The application listens for or sends data on open ports to a LAN or the Internet. The program is a hidden stealth process. Netdde.exe is able to hide itself.

Important: Some malware disguises itself as netdde.exe, particularly when not located in the C:\Windows\System32 folder. Therefore, you should check the netdde.exe process on your PC to see if it is a threat. We recommend Security Task Manager for verifying your computer's security. This was one of the Top Download Picks of The Washington Post and PC World.


User Comments

netdde.exe is the Network Dynamic Data Exchange server for Microsoft Windows. It is used to facilitate the exchange of data over a network. This program is a non-essential system process, but should not be terminated unless suspected to be causing problems.
used by intruders. Provides no services needed outside a corpoate LAN.. Not an ARPANET application
  Dr. Pepper  
Laut MS ist die Sicherheitsanfälligkeit von "NetDDE.EXE" !_HOCH_! für Win-NT + 2k + XP (vor SP2)
  Evaluator   (further information)
  Yatti PoP  
mostly business apps and OLD games. For normal home users, even with home networks, it SHOULD likely be not needed.. Find out what is calling it and try to shut it off.. It SLOWs network connections, serches, etc. It CAN be a viral issue.. check if in doubt

Rating chart

Summary: Average user rating of netdde.exe: based on 6 votes with 5 user comments. One user thinks netdde.exe is essential for Windows or an installed application. 4 users think it's neither essential nor dangerous. One user thinks netdde.exe is dangerous and recommends removing it. One user is not sure about it.

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Best practices for resolving netdde issues

A clean and tidy computer is the key requirement for avoiding problems with netdde. 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.

To help you analyze the netdde.exe process on your computer, the following programs have proven to be helpful: ASecurity Task Manager displays all running Windows tasks, including embedded hidden processes, such as keyboard and browser monitoring or Autostart entries. A unique security risk rating indicates the likelihood of the process being potential spyware, malware or a Trojan. BMalwarebytes Anti-Malware detects and removes sleeping spyware, adware, Trojans, keyloggers, malware and trackers from your hard drive.

Other processes

netdde.exe [all]