What is ntaskldr.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 ntaskldr.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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Ntaskldr.exe file information

The process known as IBM Lotus Notes/Domino belongs to software Lotus Notes by IBM (

Description: Ntaskldr.exe is not essential for the Windows OS and causes relatively few problems. The ntaskldr.exe file is located in a subfolder of C:\. Known file sizes on Windows 10/8/7/XP are 20,530 bytes (50% of all occurrences) or 9,728 bytes. 
The program is not visible. Ntaskldr.exe is not a Windows system file. The software can be uninstalled in the Control Panel. Therefore the technical security rating is 27% dangerous, however you should also read the user reviews.

Uninstalling this variant: In case of any problems with ntaskldr.exe, you may want to uninstall the associated program (Start > Control Panel > Uninstall a Program > Lotus Notes or Lotus Notes 6.5.1 cs).

Recommended: Identify ntaskldr.exe related errors

If ntaskldr.exe is located in a subfolder of "C:\Program Files", the security rating is 41% dangerous. The file size is 20,530 bytes (50% of all occurrences), 9,728 bytes or 16,776 bytes. The program has no visible window. The file is not a Windows system file. Ntaskldr.exe is able to monitor applications.

Uninstalling this variant: In case of any problems with ntaskldr.exe, you may want to do the following:
  1) uninstall the associated program (Start > Control Panel > Uninstall a Program > Lotus Notes)
  2) go to the support area of the IBM website
  3) update the program to the latest version.

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

Lotus Notes Client
  D. Kaln├Žs   (further information)
IBM Lotus Notes task loader
Default Lotus Notes file
essential part of Lotus Notes v6 upwards; spawns specific processes. Can eat 98% of your CPU if a problem arises in such a spawned task. Can kep running after you close Lotus Notes.
  Paul Frenay   (further information)
It can legitimately be installed in a subfolder of C:\, usually C:\Notes, or C:\Lotus\Notes.
  Mark Scott  
Lotus notes system file
It is part of IBM Lotus Notes 6+. It should stop when IBM Lotus Notes is ended, but if IBM Lotus Notes abends, then it may continue (visible in the Task Manager). It will prevent IMB Lotus Notes from being restarted. Ending it from the Task Manager seems to cause no problems.
  McCulloch   (further information)
May remain running after Lotus Notes Client was closed, killing via task manager does not seem to create any problem
ntaskldr is a scheduler for lotus notes. in order to terminate the
When I close Lotus Notes7.0 then it dispear but run Lotus Notes again did not show up. Seems only apear when Lotus Notes need it do something.
  Jackson Lu  
Comes with Lotus Notes v6 onwards. Essential to run Notes prog properly. If you kill this exe, it'll disable the Notes replication process.
  Kapil Pandit  
Lotus Notes Client
Crap that uses lotus notes to eat cpu up.
Updates a log file once per second (86400 times per day) so long as Notes is running. Log.nsf at C:\Program Files\LOTUS\NOTES\DATA.
  M. Riche  
Used for any notes task, like replication, indexing, compacting and so on...

Rating chart

Summary: Average user rating of ntaskldr.exe: based on 22 votes with 15 user comments. 17 users think ntaskldr.exe is essential for Windows or an installed application. 3 users think it's probably harmless. 2 users think it's neither essential nor dangerous. 2 users don't grade ntaskldr.exe ("not sure about it").

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Best practices for resolving ntaskldr issues

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

ntaskldr.exe [all]