Troubleshoot Viac7.sys.mui Issues (Free Download)

Last Updated: 11/26/2023
[Time to Read: ~3-5 minutes]

viac7.sys.mui, also known as a Processor Device Driver file, was created by Microsoft for the development of Microsoft® Windows® Operating System. MUI files fall under under the Win32 DLL (Driver) file type category.

The release of viac7.sys.mui introduced for Windows was on 08/01/2012 in Windows 8. The most recent version [file version 6.3.9600.16384 (winblue_rtm.130821-1623)] was introduced on 10/18/2013 for Windows 8.1.

This article discusses complete file details, MUI file troubleshooting instructions for problems with viac7.sys.mui, and a comprehensive set of free downloads for every file version that has been catalogued by our team.

File Analysis Provided by Jason Geater (Author)

File Overview

General Information ^✻
File Name:	viac7.sys.mui
File Extension:	MUI file extension
Description:	Processor Device Driver
Object File Type:	Driver
File Operating System:	Windows NT 32-bit
MIME Type:	application/octet-stream
User Popularity Rating:

Developer and Software Information
Software Developer:	Microsoft Corporation
Software Program:	Microsoft® Windows® Operating System
Legal Copyright:	© Microsoft Corporation. All rights reserved.

File Details
Character Set:	Unicode
Language Code:	English (U.S.)
File Flags:	(none)
File Flags Mask:	0x003f
Entry Point:	0x0000

View Other viac7.sys.mui Information

File Info	Description
File Size:	14 kB
File Modification Date/Time:	2014:11:21 06:16:30+00:00
File Inode Change Date/Time:	2017:11:05 07:04:28+00:00
File Type:	Win32 DLL
MIME Type:	application/octet-stream
Machine Type:	Intel 386 or later, and compatibles
Time Stamp:	0000:00:00 00:00:00
PE Type:	PE32
Linker Version:	11.0
Code Size:	0
Initialized Data Size:	13824
Uninitialized Data Size:	0
Entry Point:	0x0000
OS Version:	6.3
Image Version:	6.3
Subsystem Version:	6.0
Subsystem:	Windows GUI
File Version Number:	6.3.9600.16384
Product Version Number:	6.3.9600.16384
File Flags Mask:	0x003f
File Flags:	(none)
File OS:	Windows NT 32-bit
Object File Type:	Driver
File Subtype:	7
Language Code:	English (U.S.)
Character Set:	Unicode
Company Name:	Microsoft Corporation
File Description:	Processor Device Driver
File Version:	6.3.9600.16384 (winblue_rtm.130821-1623)
Internal Name:	viac7.sys
Legal Copyright:	© Microsoft Corporation. All rights reserved.
Original Filename:	viac7.sys.mui
Product Name:	Microsoft® Windows® Operating System
Product Version:	6.3.9600.16384

^✻ Portions of file data provided by Exiftool (Phil Harvey) distributed under the Perl Artistic License.

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What are viac7.sys.mui Error Messages?

Dynamic Link Library viac7.sys.mui Errors

viac7.sys.mui is considered a type of Dynamic Link Library (DLL) file. Dynamic Link Library files, like viac7.sys.mui, are essentially a "guide book" that stores information and instructions for executable (EXE) files - like sapisvr.exe - to follow. These files were created so that multiple programs (eg. Windows) could share the same viac7.sys.mui file, saving valuable memory allocation, therefore making your computer run more efficiently.

Unfortunately, what makes DLL files so convenient and efficient, also makes them extremely vulnerable to problems. If something happens to a shared MUI file, either it goes missing or gets corrupted in some way, it can generate a "runtime" error message. Runtime is pretty self-explanatory; it means that these errors are triggered when viac7.sys.mui is attempted to be loaded either when Windows is starting up, or in some cases already running. Some of the most common viac7.sys.mui errors include:

Access Violation at address - viac7.sys.mui.
viac7.sys.mui could not be found.
Cannot find C:\Windows\System32\drivers\en-US\viac7.sys.mui.
Cannot register viac7.sys.mui.
Cannot start Windows. A required component is missing: viac7.sys.mui. Please install Windows again.
Failed to load viac7.sys.mui.
The application has failed to start because viac7.sys.mui was not found.
The file viac7.sys.mui is missing or corrupt.
This application failed to start because viac7.sys.mui was not found. Re-installing the application may fix this problem.

Your viac7.sys.mui file could be missing due to accidental deletion, uninstalled as a shared file of another program (shared with Windows), or deleted by a malware infection. Furthermore, viac7.sys.mui file corruption could be caused from a power outage when loading Windows, system crash while loading viac7.sys.mui, bad sectors on your storage media (usually your primary hard drive), or quite commonly, a malware infection. Thus, it's critical to make sure your anti-virus is kept up-to-date and scanning regularly.

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How to Fix viac7.sys.mui Errors in 3 Steps (Time to complete: ~5-15 minutes)

If you're encountering one of the error messages above, follow these troubleshooting steps to resolve your viac7.sys.mui issue. These troubleshooting steps are listed in the recommended order of execution.

Step 1: Restore your PC back to the latest restore point, "snapshot", or backup image before error occurred.

To begin System Restore (Windows XP, Vista, 7, 8, and 10):

Hit the Windows Start button
When you see the search box, type "System Restore" and press "ENTER".
In the search results, find and click System Restore.
Please enter the administrator password (if applicable / prompted).
Follow the steps in the System Restore Wizard to choose a relevant restore point.
Restore your computer to that backup image.

If the Step 1 fails to resolve the viac7.sys.mui error, please proceed to the Step 2 below.

Step 2: Run SFC (System File Checker) to restore the corrupt or missing viac7.sys.mui file.

System File Checker is a utility included with every Windows version that allows you scan and restore corrupted system files. Use the SFC tool to fix missing or corrupt viac7.sys.mui files (Windows XP, Vista, 7, 8, and 10):

Hit the Windows Start button
In the search box, type "cmd" but DO NOT PRESS "ENTER".
Press and hold "CTRL-Shift" on your keyboard while pressing "ENTER".
You'll be prompted with a permission dialog box.
In the box, click "YES".
You should have a black screen with a blinking cursor.
In that black screen, type "sfc /scannow" and hit "ENTER".
SFC will begin scanning for viac7.sys.mui issues and any other system file problems.
Follow any on-screen commands to complete the process.

Please be aware that this scan might take a while, so please be patient while it is working.

If this Step 2 fails as well, please proceed to the Step 3 below.

sfc /scannow

Step 3: Perform a Windows Update.

When the first two steps haven't solved your issue, it might be a good idea to run Windows Update. Many viac7.sys.mui error messages that are encountered can be contributed to an outdated Windows Operating System. To run Windows Update, please follow these easy steps:

Hit the Windows Start button
In the search box, type "Update" and press "ENTER".
In the Windows Update dialog box, click "Check for Updates" (or similar button depending on your Windows version)
If updates are available for download, click "Install Updates".
After the update is completed, restart your PC.

If Windows Update failed to resolve the viac7.sys.mui error message, please proceed to next step. Please note that this final step is recommended for advanced PC users only.

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If Those Steps Fail: Download and Replace Your viac7.sys.mui File (Caution: Advanced)

If none of the previous three troubleshooting steps have resolved your issue, you can try a more aggressive approach (Note: Not recommended for amateur PC users) by downloading and replacing your appropriate viac7.sys.mui file version. We maintain a comprehensive database of 100% malware-free viac7.sys.mui files for every applicable version of Windows. Please follow the steps below to download and properly replace you file:

Locate your Windows operating system version in the list of below "Download viac7.sys.mui Files".
Click the appropriate "Download Now" button and download your Windows file version.
Copy the file into the appropriate directory for your Windows version:

Windows 8: C:\Windows\System32\drivers\en-US\
Windows 8.1: C:\Windows\System32\drivers\en-US\

Restart your computer.

If this final step has failed and you're still encountering the error, you're only remaining option is to do a clean installation of Windows 8.1.

GEEK TIP : We must emphasize that reinstalling Windows will be a very time-consuming and advanced task to resolve viac7.sys.mui problems. To avoid data loss, you must be sure that you have backed-up all of your important documents, pictures, software installers, and other personal data before beginning the process. If you are not currently backing up your data, you need to do so immediately.

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Download viac7.sys.mui Files (Malware-Tested 100% Clean)

CAUTION : We strongly advise against downloading and copying viac7.sys.mui to your appropriate Windows system directory. Microsoft typically does not release Windows MUI files for download because they are bundled together inside of a software installer. The installer's task is to ensure that all correct verifications have been made before installing and placing viac7.sys.mui and all other MUI files for Windows. An incorrectly installed MUI file may create system instability and could cause your program or operating system to stop functioning altogether. Proceed with caution.

Windows 8.1

File Name

Software Version

File Version

Architecture

viac7.sys.mui

6.3.9600.16384

6.3.9600.16384 (winblue_rtm.130821-1623)

64-bit (x64)

Expand for Detailed File Information +

OS Version:	Windows 8.1
Software:	Microsoft® Windows® Operating System
Software Version:	6.3.9600.16384
File Version:	6.3.9600.16384 (winblue_rtm.130821-1623)
File Size:	14336
File Date:	11/21/2014
MD5 Checksum:	93520980d9b0cfdf3bf8e3eb08f6a689
SHA1 Checksum:	24471b6d03d3dca64bcc54f018ffd2eacbf15cba
SHA256 Checksum:	4d1009d2f0f4d9af42a47c4e6b757ce341ba96b0e813fcbeddc0bd76d9a95510
CRC32:
File Directory Location:	C:\Windows\System32\drivers\en-US\

File Version, System, and Machine Information
File Type:	Win32 DLL
Image Version:	6.3
Initialized Data Size:	13824
Linker Version:	11.0
Machine Type:	Intel 386 or later, and compatibles
PE Type:	PE32
Subsystem:	Windows GUI
Subsystem Version:	6.0
File Modification Date/Time:	11/21/2014

Windows 8

File Name

Software Version

File Version

Architecture

viac7.sys.mui

6.2.9200.16384

6.2.9200.16384 (win8_rtm.120725-1247)

64-bit (x64)

Expand for Detailed File Information +

OS Version:	Windows 8
Software:	Microsoft® Windows® Operating System
Software Version:	6.2.9200.16384
File Version:	6.2.9200.16384 (win8_rtm.120725-1247)
File Size:	14336
File Date:	07/26/2012
MD5 Checksum:	7f2c43cab895ee6a40a522d1adcc04ff
SHA1 Checksum:	b60a652f3169e8af15b0d0a02bc6944699414207
SHA256 Checksum:	825fd7da95f361ae44897037867208741d9cb55f9598fd73bbb227e81403f4e2
CRC32:
File Directory Location:	C:\Windows\System32\drivers\en-US\

File Version, System, and Machine Information
File Type:	Win32 DLL
Image Version:	6.2
Initialized Data Size:	13824
Linker Version:	10.10
Machine Type:	Intel 386 or later, and compatibles
PE Type:	PE32
Subsystem:	Windows GUI
Subsystem Version:	5.1
File Modification Date/Time:	07/26/2012

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Files Related to viac7.sys.mui

MUI Files Related to viac7.sys.mui

File Name	Description	Software Program (Version)	File Size (bytes)	File Location
memtest.exe.mui	Myriad User Instrument	Windows 10	44952	C:\Users\Bill\AppData\Roaming\Microsoft\Windows...
dxpserver.exe.mui	Device Stage Platform Server	Microsoft® Windows® Operating System (6.1.7600.16385)	2560	C:\WINDOWS\Tasks\
fms.dll.mui	Myriad User Instrument	Windows 8	15872	C:\$WINDOWS.~BT\Sources\Boot\PXE\qps-ploc\
WmiPerfClass.dll.mui	Myriad User Instrument	Windows 7	2048	C:\Windows\inf\
dumpsd.sys.mui	SD Crashdump Port Driver	Microsoft® Windows® Operating System (6.2.9200.16384)	2560	C:\Windows\System32\LogFiles\WMI\RtBackup\

Other Files Related to viac7.sys.mui

File Name	Description	Software Program (Version)	File Size (bytes)	File Location
OneX_v1.xsd	XML Schema Definition	Windows 8	5957	C:\Windows\L2Schemas\
OneX_v1.xsd	XML Schema Definition	Windows 10	5957	C:\Windows\L2Schemas\
WLAN_profile_v1.xsd	XML Schema Definition	Windows XP	15263	C:\Windows\L2Schemas\
WLAN_profile_v1.xsd	XML Schema Definition	Windows 10	18585	C:\Windows\L2Schemas\
WLAN_policy_v1.xsd	XML Schema Definition	Windows 10	7627	C:\Windows\L2Schemas\

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