What is tagsrv.exe?

The genuine tagsrv.exe file is a software component of LabVIEW Shared Variable Engine by National Instruments.
“tagsrv.exe” is a file in Windows, Linux, and Mac OS operating systems by National Instruments Corporation that is known as the LabVIEW Shared Variable Engine for LabVIEW software or any other National Instruments applications. The name stands for tagger service and is the National Instruments Tagger that functions in all LabVIEW programs. It is a cross-platform application for integrating amongst all systems. “tagsrv.exe” tags variables for transferring within network systems. The file is used as part of the software that acquires data, utilizes test automation, analyzes and processes signals, and many other scenarios in development and deployment situations, such as energy grid automation and medical device development. National Instruments Corporation got started in 1976 and develops tools for scientists and engineers to make concepts become a reality through the use of innovative data collection and transmission, developmental designs, and deployment software.

TagSrv stands for Tagger Service

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 tagsrv.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 tagsrv.exe related errors

Tagsrv.exe file information

The process known as National Instruments Variable Engine or Part of Tagger belongs to software National Instruments Tagger or NI Variable Engine by National Instruments (

Description: Tagsrv.exe is not essential for the Windows OS and causes relatively few problems. The file tagsrv.exe is located in a subfolder of "C:\Program Files". Known file sizes on Windows 10/8/7/XP are 607,848 bytes (42% of all occurrences), 667,648 bytes, 676,016 bytes or 609,384 bytes. 
The program is not visible. The tagsrv.exe file is not a Windows core file. The application uses ports to connect to or from a LAN or the Internet. The program can be removed using the Control Panel's Add\Remove programs applet. It is a Verisign signed file. The file is digitally signed. Therefore the technical security rating is 28% dangerous, however you should also read the user reviews.

Uninstalling this variant: You can uninstall National Instruments Variable Engine or NI Variable Engine, or try to get help from the software vendor. Click on National Instruments Variable Engine or NI Variable Engine in the Windows Control Panel (Software or Programs section) to uninstall it, or click on to visit the vendor's website.

Recommended: Identify tagsrv.exe related errors

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

You should have this file only when you have LabVIEW (or other National Instruments software) installed.
  Koshinae   (further information)

Summary: Average user rating of tagsrv.exe: based on 2 votes with 1 user comment. 2 users think tagsrv.exe is essential for Windows or an installed application.

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Best practices for resolving tagsrv issues

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

tagsrv.exe [all]