Fixing Installer Errors: LyncMUI.msi Download and Repair

Last Updated: 09/05/2018
[Time Required for Reading: 3.5 minutes]

The development of Office 2013 by Microsoft prompted the latest creation of LyncMUI.msi. It is also known as a Microsoft Windows Installer Package file (file extension MSI), which is classified as a type of FPX (Microsoft Windows Installer Package) file.

The first release in the Windows 8 Operating System for LyncMUI.msi was on 01/29/2013 inside Office 2013. This file version is latest update offered from Microsoft, according to our records. LyncMUI.msi is included with Office 2013 and Office 2016.

In this article, you will find detailed LyncMUI.msi information, a MSI file troubleshooting guide, and a list of versions that are available for free download.

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File Overview

General Information
File Name: LyncMUI.msi
File Extension: MSI file extension
File Type: Installer
Description: Microsoft Windows Installer Package
MIME Type: image/vnd.fpx
User Popularity Rating:
Developer and Software Information
Software Program: Office 2013
Developer: Microsoft
Software: Office
Software Version: 2013
File Details
File Size (Bytes): 2105344
Oldest File Date: 05/10/2017
Latest File Date: 05/10/2017

What are LyncMUI.msi Error Messages?

General LyncMUI.msi Runtime Errors

LyncMUI.msi file errors often occur during the install phase of Office, but can also occur while the program is running. These types MSI errors are also known as “runtime errors” because they occur while Office is running. Here are some of the most common LyncMUI.msi runtime errors:

Microsoft Visual C++ Runtime Library

Runtime Error!

Program: C:\MSOCache\All Users\{90150000-012B-0409-0000-0000000FF1CE}-C\LyncMUI.msi

This application has requested the Runtime to terminate it in an unusual way.
Please contact the application's support team for more information.

Most MSI errors are due to missing or corrupt files. Your LyncMUI.msi file could be missing due to accidental deletion, uninstalled as a shared file of another program (shared with Office), or deleted by a malware infection. Furthermore, LyncMUI.msi file corruption could be caused from a power outage when loading Office, system crash while loading or saving LyncMUI.msi, bad sectors on your storage media (usually your primary hard drive), or malware infection. Thus, it’s critical to make sure your anti-virus is kept up-to-date and scanning regularly.

How to Fix LyncMUI.msi 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 LyncMUI.msi 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):

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

If the Step 1 fails to resolve the LyncMUI.msi error, please proceed to the Step 2 below.

Step 2: If recently installed Office (or related software), uninstall then try reinstalling Office software.

You can uninstall Office software by following these instructions (Windows XP, Vista, 7, 8, and 10):

  1. Hit the Windows Start button
  2. In the search box, type "Uninstall" and press "ENTER".
  3. In the search results, find and click "Add or Remove Programs"
  4. Find the entry for Office 2013 and click "Uninstall"
  5. Follow the prompts for uninstallation.

After the software has been fully uninstalled, restart your PC and reinstall Office software.

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

Office 2013

Microsoft Corporation

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 LyncMUI.msi error messages that are encountered can be contributed to an outdated Windows Operating System. To run Windows Update, please follow these easy steps:

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

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

If Those Steps Fail: Download and Replace Your LyncMUI.msi 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 LyncMUI.msi file version. We maintain a comprehensive database of 100% malware-free LyncMUI.msi files for every applicable version of Office. Please follow the steps below to download and properly replace you file:

  1. Locate your Windows operating system version in the list of below "Download LyncMUI.msi Files".
  2. Click the appropriate "Download Now" button and download your Windows file version.
  3. Copy this file to the appropriate Office folder location:
    Windows 10: C:\MSOCache\All Users\{90150000-012B-0409-0000-0000000FF1CE}-C\
    Windows 8: C:\MSOCache\All Users\{90150000-012B-0409-0000-0000000FF1CE}-C\
  4. 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.

GEEK TIP : We must emphasize that reinstalling Windows will be a very time-consuming and advanced task to resolve LyncMUI.msi 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.

Download LyncMUI.msi Files (Malware-Tested 100% Clean)

CAUTION : We strongly advise against downloading and copying LyncMUI.msi to your appropriate Windows system directory. Microsoft typically does not release Office MSI 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 LyncMUI.msi and all other MSI files for Office. An incorrectly installed MSI file may create system instability and could cause your program or operating system to stop functioning altogether. Proceed with caution.

Windows 10
Windows 8

Files Related to LyncMUI.msi

MSI Files Related to LyncMUI.msi

File Name Description Software Program (Version) File Size (bytes) File Location
1efd1.msi Microsoft Windows Installer Package Office 2007 2319872 C:\WINDOWS\Installer\
22b1d.msi Microsoft Windows Installer Package Office 2013 884736 C:\WINDOWS\Installer\
Office64MUI.msi Microsoft Windows Installer Package Office 2007 503296 C:\MSOCache\All Users\{90120000-0116-0409-1000-...
LyncMUI.msi Microsoft Windows Installer Package Office 2016 2105344 C:\MSOCache\All Users\{90150000-012B-0409-0000-...
22af1.msi Microsoft Windows Installer Package Office 2013 2105344 C:\WINDOWS\Installer\

Other Files Related to LyncMUI.msi

File Name Description Software Program (Version) File Size (bytes) File Location
WinCal.admx Windows Group Policy Language-neutral Windows 7 1768 C:\Windows\PolicyDefinitions\
pcaui.dll.mui Myriad User Instrument Windows 7 11776 C:\Windows\SysWOW64\en-US\
LocalizedStrings.xml Extensible Markup Language Office 2016 4302 C:\Program Files\Microsoft Office\Office15\ADDI...
wshbth.dll Windows Sockets Helper DLL Microsoft® Windows® Operating System (6.0.6002.18005) 44032 C:\Windows\System32\
serialui.dll.mui Serial Port Property Pages Microsoft® Windows® Operating System (6.3.9600.16384) 5120 C:\Windows\System32\en-GB\


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