mlx5ui.dll - Analyze and How to Fix Errors

⚠️ Important Notice: Optimize your MLX5 UI performance with mlx5ui.dll. Essential driver update for NVIDIA Mellanox networking solutions. Manually replacing system libraries can brick future Windows updates or cause critical system failures.

Architecture:	64-bit (x64)	Compatible with only 64-bit Windows
Creation date	05.12.2017 14:32:53
File version	1.80.18515.0
Antivirus scan	✅ Clean	No viruses detected.
Digital signature	✅ Have signed	File have signature, it is original file.
Hash Integrity	✅ MD5: Verified	File Hash protection is missing.
File size	287.3 kb.	294240 bytes.

Hashes:

MD5: d8605d707984d972850f598709f356c8 ✅
SHA-1: b0d3df8c76d05ffdbc52da3346c14a51327bfa81
SHA-256: dd1df3bdf53d1777d517174c230001d0d1f3815e026736fe333ec6aac690d80a
SHA-512: 36e10eff93f4f5bbb068fe2fb50f87a778c4443ee1fb97b96d4a1b3a9917710c78f5def19a089c65b459b4485a5c6a30d9cd2bad8b5236f8d0c79cd7184884c0

Digital file signature mlx5ui.dll ✅

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

Overview of mlx5ui.dll

The mlx5ui.dll file is a Dynamic Link Library component associated with NVIDIA ConnectX network adapters (formerly Mellanox Technologies). It contains user interface resources or configuration data for managing high-performance network interface cards (NICs), specifically those using the mlx5 driver core (such as ConnectX-4, ConnectX-5, ConnectX-6, and newer).

Standard File Location

You will typically find this file in the Windows System32 directory or inside the specific driver installation folders:

• C:\Windows\System32\
• C:\Windows\System32\DriverStore\FileRepository\ (inside the specific NVIDIA/Mellanox network driver folder)

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How to Fix mlx5ui.dll Errors Without Downloading the File

Downloading individual DLL files from third-party websites is highly unsafe and can introduce malware. Instead, use these built-in system tools and official procedures to resolve the error.

1. Reinstall or Update NVIDIA/Mellanox Drivers

Since this file belongs to your network adapter driver, reinstalling the driver will cleanly recreate the missing or corrupted DLL.

• Press Windows Key + X and select Device Manager.
• Expand the Network adapters section.
• Right-click your NVIDIA ConnectX or Mellanox device and select Uninstall device.
• Check the box that says “Attempt to remove the driver for this device” if prompted, then click Uninstall.
• Restart your computer. Windows will automatically attempt to reinstall the base driver from its local repository, restoring the file.
• (Alternative) Run the official installer package (.exe or .msi) that you previously used to set up your Mellanox/NVIDIA WinOF-2 tools.

2. Run Deployment Image Servicing and Management (DISM)

If the file is missing from the Windows driver store repository, DISM can fetch a clean copy directly from official Microsoft servers.

• Type cmd in the Windows start menu search bar.
• Right-click Command Prompt and choose Run as administrator.
• Type the following command and hit Enter:

  DISM.exe /Online /Cleanup-image /Restorehealth

• Wait for the process to reach 100% completion.

3. Run System File Checker (SFC)

After running DISM, use the SFC tool to scan your local system directories and replace the corrupted mlx5ui.dll file.

• In the same administrator Command Prompt, type the following command and hit Enter:

  sfc /scannow

• Restart your PC after the scan finishes.

4. Use Windows System Restore

If the error started happening recently after a configuration change, you can roll back your system status.

• Type Create a restore point in the Windows search bar and open it.
• Click the System Restore... button.
• Choose a date before the error started occurring and follow the on-screen prompts.

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📊 Diagnostics Tool: Verify Your mlx5ui.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:
KERNEL32.dll
├── USER32.dll
├── COMDLG32.dll
├── ADVAPI32.dll
├── ole32.dll
├── OLEAUT32.dll
├── SETUPAPI.dll
└── COMCTL32.dll

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