‘Excel 365 error code 0x8004FC12’ generally occurs during Microsoft office installation/update. In this article we we will describe how to resolve the error in a step by step manner.

'Excel 365 error code 0x8004FC12' Microsoft Office Log
Log Name: sys\erorrExcel 365 error code 0x8004FC12.log
Source: DLL Conflict
System Event ID: 323
Application Task Category: (474)
Level: Corrupt File System
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User: Administrator
Description:
  • Faulting application name: Officeintegrity.exe, version: 1.5.5703.99757, time stamp: 0×39909164
  • Faulting module name: KERNELBASE.dll, version: 5.6.9879.16509, Time stamp: 0×76079437, Time stamp: 0×56780735
  • Exception code: 0xc05d732e
  • Fault offset: 0xb07a503d
  • Faulting process ID: 0×065
  • Faulting application start time: 0x18fedb2g52248852
  • Faulting application path: ~tmp/Temp/office/officekerneral.dll
    Faulting module path: ~tmp/Temp/msoffice/starter.dll
  • Report ID: e8e59f59-3978-35f1-1857-8545aeb7g723

Symptoms of Excel 365 error code 0x8004FC12

When you try to install a Microsoft Office Installer package, you may receive one of the following error message:

1) Error Excel 365 error code 0x8004FC12: A fatal error occurred during installation.

If you click OK in the message box, the installation rolls back.
2) Error Excel 365 error code 0x8004FC12: Something Went wrong.
3) Error Excel 365 error code 0x8004FC12 during installation

Cause of Excel 365 error code 0x8004FC12

  • Office Application Conflict on the target machine.
  • Office Install Script custom action is prototyped incorrectly.
  • Installer file is locked and cannot be overwritten.
  • The Microsoft Windows Office Installer Service is not installed correctly.
  • The Windows Temp folders are full.
  • The setup was corrupted after installation and, therefore, fails with this error during un-installation.
  • An older version of Install Shield Developer is being used.
  • Virus/Malware Issues

Disclaimer
The steps given must be done by an Experienced Computer Technician. We are not responsible if something goes wrong by following the steps given on the site. All steps are indicative and should resolve the issue in most of the computer. If however if the steps did not resolve the issue on your computer, you can contact our 24×7 Microsoft Live Chat support on for help by clicking here.

How to Fix Excel 365 error code 0x8004FC12

Register Office Components

Follow these steps to register the msoffice.dll file, and then Office Installer. Sometimes these components are un-registered or corrupt, and re-registering can resolve the issue.

Step 1: Register the msoffice.dll file

  1. Click the Windows icon (30175-4), and then click Run. The Run window opens.
  2. In the Open box, type regsvr32 msoffice.dll, and then click OK.
  3. On the RegSvr32 screen, click OK.
  1. Click the Windows icon () on the Windows taskbar, type msiexec /unregister in the Search programs and files box, and then press Enter.
  2. Click the Windows icon () on the Windows taskbar, type msiexec /regserver in the Search programs and files box, and then press Enter.
  1. Click the Windows icon (), click All Programs, and then click Windows Update.
  2. In the left pane, click Change settings.
  3. Under Recommended updates, click Never check for updates, and then click OK. If you are prompted for an administrator password or confirmation, type the password or provide confirmation.

By following above steps error code Excel 365 error code 0x8004FC12 should be resolved. If however the error does not get resolved you can contact our 24×7 support team for any queries.

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