pacer.sys.mui Troubleshoot and Download

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

pacer.sys.mui file QoS Packet Scheduler. 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 pacer.sys.mui related errors on your device. You can also download pacer.sys.mui file compatible with Windows 10, Windows 8.1, Windows 8, Windows 7, Windows 7, Windows Vista, 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 7, Windows Vista, Windows Vista

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Fix pacer.sys.mui errors

1 Information about pacer.sys.mui file
2 Errors related to pacer.sys.mui file
3 How to fix pacer.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 pacer.sys.mui

4.1 List of pacer.sys.mui file versions

File info

General information
Filename	pacer.sys.mui
File extension	MUI
Description	QoS Packet Scheduler

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 pacer.sys.mui file related problems

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

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

pacer.sys.mui

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

Problems related to pacer.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 pacer.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 pacer.sys.mui errors in just few steps?

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

pacer.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 pacer.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 pacer.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 pacer.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 pacer.sys.mui file. After an error related to%fileextension% file has been discovered, the program attempts to automatically replace the pacer.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 pacer.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 pacer.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 pacer.sys.mui file

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

Go to the folder where the file should be located and paste the downloaded file. Below is the list of pacer.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\SysWOW64\drivers\en-US\
Windows 7: C:\Windows\SysWOW64\drivers\en-US\
Windows Vista: ---
Windows Vista: ---

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

System Windows 10

File size 17920 bytes

Date 2017-03-18

Download

File details
	MD5	d0d400ee3a57b18a04d73a6aea26cd21
	SHA1	4973f642eae4122dc7c8dfc8087cc2b19e60d024
	SHA256	a3fa342816991437eea1ced334fd5b25f78c10330a0893b4f85cb26e0343eac4
	CRC32	27d3bd14
	Example file location	C:\Windows\System32\drivers\en-US\

Filename pacer.sys.mui

System Windows 8.1

File size 17408 bytes

Date 2014-11-21

Download

File details
	MD5	aae0d51e60ba789f37e6f10ccdda3b98
	SHA1	920a367b9caeaf76651d4bd42679bab951ad8a84
	SHA256	23a36782b24c31be181b8cf608fd7cd8ac13e48d70d4e0c8a46b3313b227ac50
	CRC32	e14f7cb4
	Example file location	C:\Windows\System32\drivers\en-US\

Filename pacer.sys.mui

System Windows 8

File size 17408 bytes

Date 2012-07-26

Download

File details
	MD5	e0bc49b73635e21991eeadcb09783769
	SHA1	d87f34a6254de3b1b2799d40e452f11dc0a45f39
	SHA256	87a7fdb2fe3a2deb82db8137a072c81a23b69d3b8d07426ec38220828b4170c9
	CRC32	7641e597
	Example file location	1: C:\Windows\System32\drivers\en-US\

Filename pacer.sys.mui

System Windows 7

File size 15360 bytes

Date -0001-11-30

Download

File details
	MD5	0159af976f82234a37d7b2216811f24c
	SHA1	4bad703631bad50b7b75daa512e4dd2cd7d6e946
	SHA256	25ec629b3dc94371312422161b71f94ddc4ec869a3b7f0f0163bc7de9cf30c90
	CRC32	60d3c514
	Example file location	C:\Windows\SysWOW64\drivers\en-US\

Filename pacer.sys.mui

System Windows 7

File size 15360 bytes

Date 2011-04-12

Download

File details
	MD5	fe8ee46359cca5797116e999ac9027e8
	SHA1	51e44d28ff2a782c9babe94b61cfdb2cf7d8b952
	SHA256	bf8b0969c6e1e0533746251c4dc91b0978d31632f299647aa5d628c5183a9d33
	CRC32	f0555dc5
	Example file location	C:\Windows\SysWOW64\drivers\en-US\

Filename pacer.sys.mui

System Windows Vista

File size 3584 bytes

Date -0001-11-30

Download

File details
	MD5	45e640f7da6f51085e8cfba1f1c1dfc6
	SHA1	40b79403fbdccc55ec4fd7006975f5c867c2a282
	SHA256	0f248b11338956f52f32b28f455d6431445365c693bb0e8f55469049d3660dde
	CRC32	37be9bdd
	Example file location	---

Filename pacer.sys.mui

System Windows Vista

File size 3072 bytes

Date 2006-11-02

Download

File details
	MD5	b4b9662cd21712c2bb4c74a6c5b158d2
	SHA1	d4df5a20c2ef574dc3bf054c80ec1047b705923c
	SHA256	30e46e5664fcb6f099f0d83eedef303d48ed9c3d8a87f2a5f06e13040f357b89
	CRC32	76122f2e
	Example file location	---