winusbcoinstaller3.dll - Analyze and How to Fix Errors

★★★★☆ Verified File (27.08.2026)

⚠️ Important Notice: dll for Windows USB drivers installation assistance. Essential for device compatibility. Manually replacing system libraries can brick future Windows updates or cause critical system failures.

Architecture:	64-bit (x64)	Compatible with only 64-bit Windows
File version	10.0.16257.1000
Antivirus scan	✅ Clean	No viruses detected.
Digital signature	🟡 Not signed	Signature missing. The file may have been modified.
Hash Integrity	✅ MD5: Verified	File Hash protection is missing.
File size	31.5 kb.	32256 bytes.

Hashes:

MD5: d79df47334881efbbee178db258bfeba ✅
SHA-1: 431acbaddbf1eb3d5254204dee84b7ba1f338c5f
SHA-256: f0d35e5b28b6e5765e475d0c905d4e282b7efae93bc01b8176d5540f32a2eb1c
SHA-512: 54d34fd646126027427c729d45f3d78b5fd70350d31638012ea8a1cc3f50423070d11436048c9fed3555950dab08bf5fc4d5622f169aeea4a50a0f090b0ca6bf

✅ This file is compatible with 64-bit Windows and ❌ will not work on a 32-bit operating system.

File Description

winusbcoinstaller3.dll is a co-installer Dynamic Link Library file developed by Microsoft. It is used alongside the Windows USB (WinUSB) architecture. This file assists the operating system during the installation of devices that rely on the WinUSB driver. It ensures that the required WinUSB framework components are properly configured and updated on the system.

Standard File Location

The standard file locations for this DLL are:

System Location: C:\Windows\System32\
Driver Store Cache: C:\Windows\System32\DriverStore\FileRepository\ (inside specific Microsoft WinUSB framework subfolders)

How to Fix winusbcoinstaller3.dll Errors Without Downloading

You can fix errors related to this file using built-in Windows utilities. Avoid downloading DLL files from third-party websites, as they often contain malware.

1. Run SFC and DISM Tools

Windows has built-in tools to repair corrupted system files automatically.

Press Windows Key + X and select Terminal (Admin) or Command Prompt (Admin).
Type sfc /scannow and press Enter. Wait for the scan to finish.
Next, type DISM /Online /Cleanup-Image /RestoreHealth and press Enter.
Restart your computer.

2. Reinstall or Update the Affected Hardware Driver

If the error occurs when connecting a specific USB device, reinstall its driver.

Right-click the Start menu and open Device Manager.
Find the device causing the issue (look for a yellow exclamation mark).
Right-click the device and select Uninstall device.
Unplug the USB device, restart your PC, and plug the device back in. Windows will reinstall the driver using its internal cache.

3. Run Windows Update

Missing framework files are often restored through system updates.

Open Settings (Windows Key + I).
Go to Windows Update.
Click Check for updates and install all pending updates, including optional driver updates.

📊 Diagnostics Tool: Verify Your `winusbcoinstaller3.dll` File

Worried that the file on your PC has been modified by malware? Drop it into the form below. Our script will verify its file size, cryptographic hash (MD5/SHA-1), and check for a valid Microsoft digital signature.

Connected files:
msvcrt.dll
├── SETUPAPI.dll
├── ntdll.dll
└── KERNEL32.dll