What is zntport?

Zntport.sys is a Windows driver. A driver is a small software program that allows your computer to communicate with hardware or connected devices. This means that a driver has direct access to the internals of the operating system, hardware etc. The free file information forum can help you determine if zntport.sys is a Windows system file or if it belongs to an application that you can trust.

Run a free scan to check for zntport drivers in need of updating

Zntport.sys file information

The process known as zntport belongs to software NTPort Library or NTPort Library Driver by Zeal SoftStudio (

Description: Zntport.sys is not essential for Windows and will often cause problems. The file zntport.sys is located in the C:\Windows\System32\drivers folder or sometimes in the C:\Windows\System32 folder. Known file sizes on Windows 10/8/7/XP are 6,080 bytes (90% of all occurrences), 6,560 bytes or 14,168 bytes. 
The driver can be started or stopped from Services in the Control Panel or by other programs. The program has no visible window. The service has no detailed description. It is not a Windows core file. zntport.sys appears to be a compressed file. Therefore the technical security rating is 37% dangerous, however you should also read the user reviews.

Uninstalling this variant: You can uninstall LI Hai or NTPort Library 2.5 Evaluation, or try to get help from the software vendor. Click on LI Hai or NTPort Library 2.5 Evaluation in the Windows Control Panel (Software or Programs section) to uninstall it, or click on to visit the vendor's website.

Recommended: Identify zntport.sys related errors

Important: Some malware camouflages itself as zntport.sys. Therefore, you should check the zntport.sys 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

I was alerted to the file by AuditFailure event, I think it was installed on my Acer PC by the manufacturer and is probably ok.
  Nik A  
It's a driver that allows programmers direct access to hardware ports in windows nt/2000/xp. It is located in the windows\system32 folder
  Pete   (further information)
It allows a program direct access to the printer port
  Louis Pittsley   (further information)

Summary: Average user rating of zntport.sys: based on 4 votes with 3 user comments. One user thinks zntport.sys is essential for Windows or an installed application. One user thinks it's probably harmless. One user thinks it's neither essential nor dangerous. One user thinks zntport.sys is dangerous and recommends removing it.

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Best practices for resolving zntport issues

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

zntport.sys [all]