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nusb3co.dll - Analyze and How to Fix Errors

★★★★☆ Verified File (27.08.2026)

Description


Creation date: 26.12.2011 02:38:25
File version: 2.1.29.0
Antivirus scan: ✅ OK
Category: Runtime
File size: 80 kb.
Architecture: 64-bit (x64)
✅ This file is compatible with 64-bit Windows and ❌ will not work on a 32-bit operating system.
How to determine your system architecture: Press keys Win+R , enter symbols wmic os get osarchitecture , press Enter.

The nusb3co.dll file is a Dynamic Link Library (DLL) used in Windows operating systems. DLL files are small modules that contain code and resources such as functions, data, and strings that can be shared across multiple programs. This makes the system more efficient by reducing redundancy and improving performance.

MD5: 806d730cf57e93b2c6267877485ce9c4
SHA-1: 166d57f0ac9e1dacee9ae9936ae1e0acb393edf7
SHA-256: 9f390ff3844eb516caeb8535ec38759c4291d79a9bfcfee696610cfb6c7894e3

Where it is used

nusb3co.dll is likely associated with USB drivers or device drivers from Renesas. It may be part of the installation package for hardware devices that require specific driver support, such as certain types of USB controllers.

Errors related to nusb3co.dll

Common issues with nusb3co.dll include:

  • "nusb3co.dll not found"
  • "missing nusb3co.dll"
  • "error loading nusb3co.dll"

File security

The file nusb3co.dll is generally safe as it appears to be a legitimate component of Renesas' software. However, any DLL can potentially pose risks if tampered with or replaced by malware. To ensure safety:

  • Verify the MD5 hash (806d730cf57e93b2c6267877485ce9c4) matches the official version.
  • Ensure your system is updated to the latest patches and updates from Renesas.
nusb3co.dll was not found
The code execution cannot proceed because nusb3co.dll was not found
Failed to load nusb3co.dll
The procedure entry point ... could not be located in nusb3co.dll

1.
2a. 👉 Try to copy nusb3co.dll C:\Program Files\Your program\
2b. Also try to copy to bin, lib folders.
2c. Try to copy nusb3co.dll C:\Program Files (x86)\Your program\
👉 Always create a backup before replacing files.
How do I switch to the current Windows directory?
- Press and hold the key "win" on the keyboard and press the key "r" , then write %windir% and press the key Enter.
How to switch to the directory Program Files (x86) ?
- Press Win+R then enter %ProgramFiles(x86)% and after press Enter.

How to fix errors

If you encounter issues with nusb3co.dll, consider these steps:

  1. Reinstall the program: Sometimes, reinstalling the software that requires this DLL can resolve missing or corrupt files.
  2. Update Windows: Ensure your operating system is up-to-date with the latest security patches and updates.
  3. Manually replace nusb3co.dll: If you have a backup of the original file, you can manually replace it. However, be cautious as incorrect replacements may cause further issues.

FAQ

Q: What is nusb3co.dll?

A: It is a DLL file used by USB drivers or hardware devices from Renesas.

Q: Why does it give an error?

A: Common errors include missing the file, incorrect version, or corruption. Ensure your system and software are up-to-date to avoid these issues.

Conclusion

If you encounter any issues with nusb3co.dll, take steps to update your system and reinstall necessary components. Ensuring the file is legitimate by checking its MD5 hash can also prevent potential security risks.


The file nusb3co.dll is a co-installer Dynamic Link Library (DLL) file associated with the Renesas Electronics (formerly NEC) USB 3.0 Host Controller Driver. It is used by the operating system to facilitate the proper installation and configuration of USB 3.0 hardware ports on the motherboard.

Standard File Location

The legitimate file is typically located in the following system directory:

  • C:\Windows\System32\

(Note: It may also appear in subfolders of C:\Windows\System32\DriverStore\FileRepository\ where driver backups are kept).

How to Fix nusb3co.dll Errors Without Downloading

To fix errors related to this file safely without downloading external DLLs from untrusted websites, use the following methods:

1. Reinstall or Update the USB 3.0 Drivers

Since this file is part of your hardware drivers, letting Windows reinstall the driver will restore the missing file.

  1. Press Windows Key + X and select Device Manager.
  2. Expand the Universal Serial Bus controllers section.
  3. Look for Renesas Electronics USB 3.0 Host Controller (or a similar name).
  4. Right-click it and select Uninstall device.
  5. Restart your computer. Windows will automatically search for and reinstall the driver upon reboot.

2. Run the System File Checker (SFC)

If the file was corrupted within a Windows driver repository, the built-in System File Checker can repair it.

  1. Type cmd in the Windows search bar.
  2. Right-click Command Prompt and select Run as administrator.
  3. Type the following command and press Enter:
    sfc /scannow
  4. Wait for the process to complete (10-15 minutes) and restart your PC.

3. Run the DISM Tool

If the SFC scan cannot fix the issue, the Deployment Image Servicing and Management (DISM) tool can repair the underlying Windows image.

  1. Open Command Prompt as an administrator.
  2. Type the following command and press Enter:
    DISM /Online /Cleanup-Image /RestoreHealth
  3. After the scan finishes, run the sfc /scannow command one more time, then reboot.
Other versions:
️ nusb3co.dll 2.1.29.0 32-bit (x86)