yk63x86.sys.mui Informations - Download and Fix

Sometimes Windows system displays error messages regarding corrupted or missing yk63x86.sys.mui files. Situations like that can occur, for example, during a software installation process. Each software program requires certain resources, libraries, and source data to work properly. Corrupted or nonexistent yk63x86.sys.mui file can therefore effect in failed execution of the started process.

yk63x86.sys.mui file NDIS6.30 Miniport Driver for Marvell Yukon Ethernet Controller. The file was developed by for use with software. Here you will find detailed information about the file and instructions how to proceed in the event of yk63x86.sys.mui related errors on your device. You can also download yk63x86.sys.mui file compatible with Windows 8 devices which will (most probably) allow you to solve the problem.

For Windows Compatible with: Windows 8

File info

General information
Filename yk63x86.sys.mui
File extension MUI
Description NDIS6.30 Miniport Driver for Marvell Yukon Ethernet Controller
Program Marvell Yukon Ethernet Controller
Author Marvell
MIME type application/octet-stream
File type Driver
System Windows NT 32-bit
Copyrights ©Copyright 2002-2011 Marvell®. All rights reserved.
Character set Unicode
Language cod English (U.S.)

There are various types of errors related to yk63x86.sys.mui file. yk63x86.sys.mui file may be located in wrong file directory on your device, may not be present in the system, or may be infected with malicious software and therefore not work correctly. Below is a list of most common error messages related to yk63x86.sys.mui file. If you encounter one listed below (or similar), please consider the following suggestions.

  • yk63x86.sys.mui is corrupted
  • yk63x86.sys.mui cannot be located
  • Runtime Error - yk63x86.sys.mui
  • yk63x86.sys.mui file error
  • yk63x86.sys.mui file cannot be loaded. Module was not found
  • cannot register yk63x86.sys.mui file:
  • yk63x86.sys.mui file could not be loaded
  • yk63x86.sys.mui file doesn't exist



Application could not be started because yk63x86.sys.mui file is missing. Reinstall the application to solve the problem.


Problems related to yk63x86.sys.mui can be addressed in various ways. Some methods are meant only for advanced users. If you don't have confidence in your skills, we suggest consulting a specialist. Fixing yk63x86.sys.mui file errors should be approached with utmost caution for any mistakes can result in unstable or unproperly working system. If you have the necassary skills, please proceed.

yk63x86.sys.mui file errors can be caused by various factors, so its is beneficial to try to fix them using various methods.

Step 1: Scan your computer for any malicious software

Virus Scan

Windows files are commonly attacked by malicious software that prevents them from working properly. First step in addressing problems with yk63x86.sys.mui file or any other Windows system files should be scanning the system for malicious software using an antivirus tool.

If by any chance you don't have any antivirus software installed on your system yet, you should do it immediately. Unprotected system is not only a source of file errors, but, more importantly, makes your system vulnerable to many dangers. If you don't know which antivirus tool to choose, consult this Wikipedia article – comparison of antivirus software.

Step 2: Update your system and drivers.

Windows Update

Installing relevant Microsoft Windows patches and updates may solve your problems related to yk63x86.sys.mui file. Use dedicated Windows tool to perform the update.

  1. Go to the Windows "Start" menu
  2. Type "Windows Update" in the search field
  3. Choose the appropriate software program (name may vary depending on your system version)
  4. Check if your system is up to date. If any unapplied updates are listed, install them immediately.
  5. After the update has been done,restart your computer in order to complete the process.

Beside updating the system, it is recommended that you install latest device drivers, as drivers can influence proper working of yk63x86.sys.mui or other system files. In order to do so, go to your computer or device producer's website where you will find information regarding latest driver updates.

Step 3: Use System File Checker (SFC) tool

System File Checker

System File Checker is a Microsoft Windows tool. As the name suggests, the tool is used for identyfing and addressing system file related errors, including those related to yk63x86.sys.mui file. After an error related to%fileextension% file has been discovered, the program attempts to automatically replace the yk63x86.sys.mui file with properly working version. To use the tool:

  1. Go to the Windows "Start" menu
  2. Type "cmd" in the search field
  3. Locate "Command Prompt" result – don't run it yet:
  4. Click the right mouse button and select "Run as Administrator" option
  5. Type "sfc /scannow" in console prompt to start the program and follow the instructions

Step 4: Restoring Windows system

Windows Recovery

Another approach is to restore system to previous state, before the yk63x86.sys.mui file error occured. In order to restore your system, follow the instructions below

  1. Go to the Windows "Start" menu
  2. Type "System Restore" in the search field
  3. Start the system restore tool – it's name may differ depending on version of the system
  4. The application will guide you through the process – read the messages carefully
  5. After the process has finished, restart your computer.

If all the above-mentioned methods failed and the yk63x86.sys.mui file problem has not been resolved, proceed to the next step. Remember that the following steps are intended only for advanced users.

Download and replace yk63x86.sys.mui file

The last solution is to manually download and replace yk63x86.sys.mui file in appropriate folder on the disk. Select file version compatible with your operating system and click the "Download" button. Next, go to your web browser's "Downloaded" folder and copy the downloaded yk63x86.sys.mui file.

Go to the folder where the file should be located and paste the downloaded file. Below is the list of yk63x86.sys.mui file example directory paths.

  • Windows 8: C:\Windows\System32\drivers\en-US\

If the steps did not solve your yk63x86.sys.mui file problem, you should consult a professional. A probability exists that the error(s) might be device-related and therefore should be resolved at the hardware level. A fresh operating system installation might be necessary – a faulty system installation process can result in data loss.

File versions list

Filename yk63x86.sys.mui
System Windows 8
File size 5632 bytes
Date 2012-07-26
File details
MD5 8ee86bcb4356006d577b73ad4509b85b
SHA1 3832c78142707da2bf63169047da1230019b5e45
SHA256 57543957e507c51da81e254c45796330e30d33234fa0f4ef35226a3f4953e493
CRC32 6d7fc06f
Example file location C:\Windows\System32\drivers\en-US\