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What does the PccNTMon.exe file do?

The PccNTMon.exe process is also known as I/O Monitor or, as the case may be, Trend Micro OfficeScan Monitor and is a part of Trend Micro OfficeScan Client or, as the case may be, Trend Micro Client/Server/Messaging Security for SMB. This software is produced by Trend Micro (www.trendmicro.com). An obsolete or defective version of PccNTMon.exe can cause problems for your computer that can range from slowness to error messages such as these:

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What you should know about PccNTMon.exe I/O Monitor

PccNTMon.exe is not part of Windows, but it is important nonetheless. PccNTMon.exe is found in a subdirectory of "C:\Program Files". Frequently occurring are file sizes such as 702,072 bytes (14% of all these files), 398,784 bytes as well as 10 other variants.
The program appears as a small tray icon. You will find it on the Windows taskbar next to the clock. If you don't see the tray icon, click the white (<) symbol. This PccNTMon program is recognizable as a window and also on the taskbar. The file does not come from Microsoft and is not part of the operating system. It contains a digital signature from Verisign, a subsidiary of Symantec. Verisign thereby confirms this file's authenticity and integrity. The producer of the file is registered with a certificate authority. This confirms the genuineness of the file. PccNTMon.exe is capable of record keystrokes. For this reason, 8% of all experts consider this file to be a possible threat. The probability that it can cause harm is high.

A PccNTMon.exe file has a 29% certainty of being dangerous if it is found in a subdirectory of C:\. In this case, the file size is usually 335,872 bytes (50% of all these files) or, as the case may be, 405,504 bytes. This file is no part of Microsoft Windows. PccNTMon.exe is capable of log keyboard entries.

If you see this file on your hard drive or in Windows Task Manager, please make sure that it is not a malicious variant. It's a fact that many trojans try to cloak their true identity by calling themselves PccNTMon.exe. With the above information or by using tools like Security Task Manager you can determine if, in your case, the file is an undesirable variant.

What do other computer users say about PccNTMon?

Realtime monitoring for OfficeScan Virus Killer.
Trend Micro essential file.
Aaron
application error
It's vital for Trend Micro OfficeScan client to run.
Reed
I encountered the same
Anup Kumar Bal

Summary: 5 users judge PccNTMon.exe to be an essential file that should not be touched. One user considers it harmless. source: file.net

How to uninstall Trend Micro OfficeScan Client or Trend Micro Client/Server/Messaging Security for SMB

PccNTMon.exe I/O Monitor fix

To remove I/O Monitor from your computer, please follow the manual instructions below or use an automatic uninstaller product.

  1. Click the Windows Start Button. In Windows 8, look for Control Panel.
  2. Click Control Panel.
  3. Click Uninstall a program.
  4. Look for Trend Micro OfficeScan Client or Trend Micro Client/Server/Messaging Security for SMB in the list of available programs.
  5. Click Uninstall.

How to tell if PccNTMon.exe (I/O Monitor) was uninstalled cleanly

After uninstalling, restart your computer. Then start Windows Explorer and see if there is still a folder with the name of the software under C:\Program Files. Be sure to check the Registry as well for remnants of I/O Monitor. To do this, start "Regedit", then look under "HKEY_LOCAL_MACHINE" > "Software" for I/O Monitor or the name of the producer. Always keep in mind that only a computer professional should ever directly delete entries in the Windows Registry.

What to do if a program does not uninstall

The easiest way to remove any kind of software cleanly and accurately is to use an uninstaller tool. Because the uninstaller automatically creates a backup, there is no risk of anything going wrong.

Last but not least

If Windows not working quite right for you, or if startup is taking a long time, or PccNTMon.exe is causing problems for you, a good Windows diagnostic tool may very well help. This is especially effective when it comes to older computers that have accumulated vast quantities of "garbage data" as the result of many software installs and uninstalls.

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