What is nusb3mon.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 nusb3mon.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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Nusb3mon.exe file information

Windows Task Manager with nusb3mon
Nusb3mon.exe process in Windows Task Manager

The process known as USB 3.0 Monitor or AMD USB (version 3.0 Device Detector)

belongs to software Renesas Electronics USB (version 3.0 Host Controller, 3.0 Host) or NEC Electronics USB (version 3.0 Host Controller, 3.0 Host) or AMD USB (version 3.0 Device Detector) or Western Digital USB (version 3.0 Host Controller, 3.0 Host) or USB 3.0 Monitor or Rocketfish USB (version 3.0 PCI Express Card)

by Renesas Electronics or NEC Electronics ( or Advanced Micro Devices (

Description: Nusb3mon.exe is not essential for the Windows OS and causes relatively few problems. The nusb3mon.exe file is located in a subfolder of "C:\Program Files". Known file sizes on Windows 10/8/7/XP are 106,496 bytes (42% of all occurrences), 113,288 bytes, 115,048 bytes, 97,280 bytes or 113,296 bytes. 
The program is not visible. The application starts upon Windows startup (see Registry key: MACHINE\Run). The nusb3mon.exe file is not a Windows system file. The application can be uninstalled in the Control Panel. Therefore the technical security rating is 40% dangerous, however you should also read the user reviews.

Uninstalling this variant: The developer Renesas provides a support site for assistance [1][2], and an uninstaller (Control Panel ⇒ Uninstall a Program ⇒ Renesas Electronics USB 3.0 Host Controller or NEC Electronics USB 3.0 Host Controller).

Recommended: Identify nusb3mon.exe related errors

Important: Some malware camouflages itself as nusb3mon.exe, particularly when located in the C:\Windows or C:\Windows\System32 folder. Therefore, you should check the nusb3mon.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

USB 3.0 Treiber
Driver utility software installed with my USB 3.0 PCI card
  Some Guy   (further information)
USB Monitor File for ASUS Mobo
was installed with my USB 3.0 PCI card
  daltont2000   (further information)
Tuneup 2013 program deactivator
Used for USB 3.0 PCI Card.
Produces notifications for higher bandwith but does not seem to influence USB functionality when process is stopped or uninstalled.

Rating chart

Summary: Average user rating of nusb3mon.exe: based on 12 votes with 7 user comments. 6 users think nusb3mon.exe is essential for Windows or an installed application. 5 users think it's probably harmless. One user thinks it's neither essential nor dangerous.

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Best practices for resolving nusb3mon issues

A clean and tidy computer is the key requirement for avoiding problems with nusb3mon. 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 nusb3mon.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

nusb3mon.exe [all]