What is NTRtScan.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 NTRtScan.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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NTRtScan.exe file information

Windows Task Manager with NTRtScan
NTRtScan.exe process in Windows Task Manager

The process known as Trend Micro Common Client Real-time Scan Service (version (32-bit), (64-bit)) belongs to software Trend Micro OfficeScan Client or Trend Micro Client/Server/Messaging Security for SMB or Trend Micro Client/Server Security Agent or Trend Micro OfficeScan or Trend Micro Worry-Free Business Security by Trend Micro (

Description: NTRtScan.exe is not essential for the Windows OS and causes relatively few problems. NTRtScan.exe is located in a subfolder of "C:\Program Files" or sometimes in a subfolder of "C:\Program Files\Common Files"—e.g. C:\Program Files\Trend Micro\OfficeScan Client\ or C:\OfficeScan NT\. Known file sizes on Windows 10/8/7/XP are 360,448 bytes (14% of all occurrences), 495,616 bytes and 25 more variants. 
The program is not visible. The file is not a Windows system file. NTRtScan.exe is able to monitor applications. Therefore the technical security rating is 33% dangerous, however you should also read the user reviews.

Uninstalling this variant: In the event of any problems with NTRtScan.exe, you could also do the following:
  1) uninstall the software Trend Micro OfficeScan Client or Trend Micro Client/Server using the Uninstall a Program function of Windows Control Panel (Windows: Start, Settings, Control Panel, Uninstall a Program)
  2) look for help on the website.

Recommended: Identify NTRtScan.exe related errors

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

Part of Trend Micro OfficeScan
  chris   (further information)
Necessary for OfficeScan NT
It is part of Trend Micro Office Scan suite. Having said that, anyone could create a malicious software and name it Ntrtscan.exe. If you DO NOT have Trend Micro antivirus installed on your PC and this error turns up, you've likely contracted a virus disguised under this name.
It's part of the trend anti virus program
  Andy Miles  
It's a Process used with TrendMicro
  IT Systems Adminstrator   (further information)
Just can't seem to unistall or modify settings for this program, installed by a underqualified network tech at a corp I worked for, he password protected it, doesn't know the password, nor do I....
It doesn't seem to be doing any damage, but it's eating up 99% of processing power.
  Doug Horn  
Part of Trend Micro anti virus
  Khurram Satti  
it is part of trendmicro antivirus particularlarly accoures when unplaned system shutdown .
  Dhanpal rawat system administrator  
it is totally useless toy for stupid system administrators to prove their questionable usefullness
  unhappy user  
Even when idle, this process holds onto 55 threads v10SP1. Since upgrading to this latest version of Trend Micro Antivirus, workstation is slower than ever.
to texxs, call trend support they can walk you through resetting the uninstall password, it is stored internally and there is a utility to reset it.
  marcus irraleus  
It's a Process used with TrendMicro. How about reinstalling the trend Micro. Might resolve the issue
manual scan cannot process
antivirus, trend micro officescan 10.x (bei mir)

Rating chart

Summary: Average user rating of NTRtScan.exe: based on 29 votes with 17 user comments. 20 users think NTRtScan.exe is essential for Windows or an installed application. 5 users think it's probably harmless. 2 users think it's neither essential nor dangerous. 2 users think NTRtScan.exe is dangerous and recommend removing it. 7 users don't grade NTRtScan.exe ("not sure about it").

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Best practices for resolving NTRtScan issues

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

NTRtScan.exe [all]