Troubleshoot acpi.sys.mui Errors and Download File

Sometimes Windows system displays error messages regarding corrupted or missing acpi.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 acpi.sys.mui file can therefore effect in failed execution of the started process.

acpi.sys.mui file ACPI Driver for NT. 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 acpi.sys.mui related errors on your device. You can also download acpi.sys.mui file compatible with Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Vista devices which will (most probably) allow you to solve the problem.

Compatible with: Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Vista

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Fix acpi.sys.mui errors

1 Information about acpi.sys.mui file
2 Errors related to acpi.sys.mui file
3 How to fix acpi.sys.mui related errors?

3.1 Scanning for malicious software
3.2 System and driver update
3.3 System File Checker tool
3.4 System recovery

4 Download acpi.sys.mui

4.1 List of acpi.sys.mui file versions

File info

General information
Filename	acpi.sys.mui
File extension	MUI
Description	ACPI Driver for NT

Software
Program	Microsoft® Windows® Operating System
Author	Microsoft Corporation

Details
MIME type	application/octet-stream
File type	Driver
System	Windows NT 32-bit
Copyrights	© Microsoft Corporation. All rights reserved.
Character set	Unicode
Language cod	English (U.S.)

Most common acpi.sys.mui file related problems

There are various types of errors related to acpi.sys.mui file. acpi.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 acpi.sys.mui file. If you encounter one listed below (or similar), please consider the following suggestions.

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

acpi.sys.mui

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

Problems related to acpi.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 acpi.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.

How to fix acpi.sys.mui errors in just few steps?

Remember, before taking any action related to system files perform a backup copy of your data!

acpi.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

Windows files are commonly attacked by malicious software that prevents them from working properly. First step in addressing problems with acpi.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.

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

Go to the Windows "Start" menu
Type "Windows Update" in the search field
Choose the appropriate software program (name may vary depending on your system version)
Check if your system is up to date. If any unapplied updates are listed, install them immediately.
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 acpi.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 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 acpi.sys.mui file. After an error related to%fileextension% file has been discovered, the program attempts to automatically replace the acpi.sys.mui file with properly working version. To use the tool:

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

Step 4: Restoring Windows system

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

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

If all the above-mentioned methods failed and the acpi.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 acpi.sys.mui file

The last solution is to manually download and replace acpi.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 acpi.sys.mui file.

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

Windows 10: C:\Windows\System32\drivers\en-US\
Windows 8.1: C:\Windows\System32\drivers\en-US\
Windows 8: 1: C:\Windows\System32\drivers\en-US\
Windows 7: C:\Windows\System32\drivers\en-US\
Windows Vista: C:\Windows\System32\drivers\en-US\

If the steps did not solve your acpi.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 acpi.sys.mui

System Windows 10

File size 10752 bytes

Date 2017-03-18

Download

File details
	MD5	1f2c195dcd7f6d44042b2a7b729cd40e
	SHA1	5c84a9c05476489f49dfd7bd3b1d9c565a7c0e93
	SHA256	657f56f55f0f3569faa63a7f8a9393018e7166efa1081d2263b1b3aa660446a1
	CRC32	fd09ae23
	Example file location	C:\Windows\System32\drivers\en-US\

Filename acpi.sys.mui

System Windows 8.1

File size 10240 bytes

Date 2014-11-21

Download

File details
	MD5	b5da56efd818f1c893e2107ec968ce05
	SHA1	8ea19bf1daa9fa85de5da504b18092e648d627ae
	SHA256	e85360baaeff31c1a564c59b2bcaa6be1189fc411c413dedea1466c6cd3bfe74
	CRC32	99f87e6b
	Example file location	C:\Windows\System32\drivers\en-US\

Filename acpi.sys.mui

System Windows 8

File size 10240 bytes

Date 2012-07-26

Download

File details
	MD5	34bbfcda51fb9fac51b7cb753a7d9c94
	SHA1	4fe417e9e5a623970ede3bc54e16e425dfed1f35
	SHA256	f38e35c6f7beb81c5b423c552ce688073c18b09d6693f649d37330791957273a
	CRC32	bc86be6e
	Example file location	1: C:\Windows\System32\drivers\en-US\

Filename acpi.sys.mui

System Windows 7

File size 9216 bytes

Date 2011-04-12

Download

File details
	MD5	32022c811a44b86ff45d20acab6d9bf6
	SHA1	152c9ee255204c3fa64c1f3bbaad1b4b95b9fb86
	SHA256	fdea57ec9055cc99f1719ec91cf26effd59e1a4883e3f7405265d2bbb6dec30d
	CRC32	d15a6e50
	Example file location	C:\Windows\System32\drivers\en-US\

Filename acpi.sys.mui

System Windows Vista

File size 9216 bytes

Date 2006-11-02

Download

File details
	MD5	267b452d74b9d979f00ec46af8687c49
	SHA1	43a095f7cfdb0e2302c49c5150bc82afbbce3482
	SHA256	7a9d7f1be17555df30dfe0de3974ab2fc2abdb1507840a122ef4b8b2cca1da45
	CRC32	527d69a7
	Example file location	C:\Windows\System32\drivers\en-US\