What is nslookup.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 nslookup.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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Nslookup.exe file information

The process known as nslookup or nslookup APP belongs to software Système d'exploitation Microsoft Windows or Betriebssystem Microsoft Windows by Microsoft (

Description: The original nslookup.exe is an important part of Windows and rarely causes problems. Nslookup.exe is located in a subfolder of C:\Windows. The file size on Windows 10/8/7/XP is 98,304 bytes. 
The file is a Windows system file. The nslookup.exe file is a trustworthy file from Microsoft. The program has no visible window. nslookup.exe appears to be a compressed file. Therefore the technical security rating is 2% dangerous, however you should also read the user reviews.

Recommended: Identify nslookup.exe related errors

If nslookup.exe is located in the C:\Windows\System32 folder, the security rating is 16% dangerous. The file size is 99,840 bytes. The file is a Microsoft signed file. The program is not visible. The file is not a Windows core file. nslookup.exe appears to be a compressed file.

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

Nslookup.exe is a command-line administrative tool for testing and troubleshooting DNS servers. This tool is installed along with the TCP/IP protocol through Control Panel.
  Alex   (further information)

Summary: Average user rating of nslookup.exe: based on 1 vote with 1 user comment. One user thinks nslookup.exe is essential for Windows or an installed application.

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Best practices for resolving nslookup issues

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

nslookup.exe [all]