What is nsd.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 nsd.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.

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Nsd.exe file information

Windows Task Manager with nsd
Nsd.exe process in Windows Task Manager

The process known as wnsd or IBM Lotus Notes/Domino belongs to software IBM wnsd or IBM Notes Diagnostics or ]project-open or IBM Lotus Notes/Domino by IBM (

Description: Nsd.exe is not essential for the Windows OS and causes relatively few problems. Nsd.exe is located in a subfolder of "C:\Program Files". Known file sizes on Windows 10/8/7/XP are 3,411,968 bytes (20% of all occurrences), 6,656 bytes, 3,391,488 bytes, 4,453,768 bytes or 5,162,088 bytes. 
The program has no visible window. Nsd.exe is not a Windows system file. There is no description of the program. Nsd.exe is able to monitor applications and manipulate other programs. Therefore the technical security rating is 34% dangerous.

Uninstalling this variant: You can use the software publisher’s support [1][2], update the program or uninstall IBM Notes Browser Plug-in or ]project-open[ from your computer using the Control Panel applet Uninstall a Program.

Recommended: Identify nsd.exe related errors

If nsd.exe is located in a subfolder of C:\, the security rating is 47% dangerous. The file size is 3,399,680 bytes (33% of all occurrences), 5,157,888 bytes or 3,282,312 bytes. The program has no visible window. The nsd.exe file is not a Windows system file. The application has no file description. There is no detailed description of this service. Nsd.exe is able to monitor applications and manipulate other programs.

Important: Some malware camouflages itself as nsd.exe, particularly when located in the C:\Windows or C:\Windows\System32 folder. Therefore, you should check the nsd.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.


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Best practices for resolving nsd issues

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

To help you analyze the nsd.exe process on your computer, the following programs have proven to be helpful: Security 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. Malwarebytes Anti-Malware detects and removes sleeping spyware, adware, Trojans, keyloggers, malware and trackers from your hard drive.

Other processes

nsd.exe [all]