What is nalserv.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 nalserv.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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Nalserv.exe file information

Windows Task Manager with nalserv
Nalserv.exe process in Windows Task Manager

The process known as Nalpeiron LAN Service Build March (version 20th 2012) or LAN Service Build October (version 2nd, 2013) or LAN Service Build Aug (version 28th 2012) belongs to software netNLS or SDL Trados Studio (version 2011 SP2, 2014 SP2) by Nalpeiron (

Description: Nalserv.exe is not essential for the Windows OS and causes relatively few problems. Nalserv.exe is located in a subfolder of C:\Windows. Known file sizes on Windows 10/8/7/XP are 135,168 bytes (60% of all occurrences) or 147,056 bytes. 
The program has no visible window. The nalserv.exe file is not a Windows system file. The nalserv.exe file is located in the Windows folder, but it is not a Windows core file. Therefore the technical security rating is 42% dangerous.

Uninstalling this variant: The software publisher SDL provides direct support ( You could uninstall the program using the Control Panel ⇒ Uninstall a ProgramSDL Trados Studio 2014 SP2.

Recommended: Identify nalserv.exe related errors

If nalserv.exe is located in the C:\Windows\System32 folder, the security rating is 41% dangerous. The file size is 135,168 bytes (75% of all occurrences) or 144,608 bytes. The program is not visible. It is not a Windows core file.

Uninstalling this variant: The software publisher SDL provides direct support ( You could uninstall the program using the Control Panel ⇒ Uninstall a ProgramSDL Trados Studio 2011 SP2.

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

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

nalserv.exe [all]