Microsoft Office Installation Error 1935

The error reportedly occurs while installing Microsoft Office 2010/ 2007; or one of its stand-alone products such as Microsoft Office Word, Microsoft Office Excel, Microsoft Office OneNote, and so on.

1935. An error occurred during the installation of assembly component {10CD20D2-33E-4174-9D02-3C6C26163DA6}. HRESULT: 0x80070BC9

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Alternative manual troubleshooting steps are given below:

Download Microsoft System Update Readiness Tool

During installation of Microsoft Office package new updates might be installed from the web. The computer may have failed to install them correctly, thereby resulting into MS Office error 1935.

1. Visit Microsoft Download Center.

2. In the Search Box, type “System Update Readiness Tool” and then open that from the Search Results.


3. Choose the compatible version for your system depending on your operating system version and type (32 bit/ 64 bit).

Disconnect Web & Re-run Setup

Your computer may be failing to completely download new updates during Microsoft Office installation setup. Do not attempt to download new updates by disconnecting your Internet connection, and then re-running the setup as administrator.

Repair Microsoft .NET Framework Client Profile

You may have to repair the installation of Microsoft .NET Framework Client Profile version installed on your PC.

1. Open Programs and Features from Control Panel under Programs category.


2. Choose Microsoft .NET Framework <Version> Client Profile, select Change.

3. In the new wizard that opens, select “Repair .NET Framework <Version> Client Profile to its original state”, and then click Next.

Verify Setup Configs

Using Registry Editor tool in Windows check whether the computer settings are properly configured.

1. Open Registry Editor. To do so, type “RegEdit” in the Run dialog that opens with Windows Key + R key combinations.


2. Locate following sub key:

  • HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control

3. Double click a DWORD named “RegistrySizeLimit”, and then replace its value with “ffffffff” (without quotes; 8 f’s in small)


4. Press ENTER, exit RegEdit and then restart your PC.

Rename MSCoreebak.dll File

The file is stored in your system partition. You may have to rename it prior to start Microsoft Office installation.

1. Exit the Office setup, and then go to following directory:

  • C:\Windows\System32


2. Rename “MSCOREE.DLL” file as “MSCOREE.DLL.OLD”

Turn On Windows Installer Verbose Logging

In order to successfully install Microsoft Office package it is important to have Verbose Logging feature enabled. The Registry steps to activate this feature are given under:

1. Open up the Registry again.

2. Locate below sub key:

  • HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\Installer

3. Replace “Debug” DWORD Value to “00000007”

4. Replace “Logging” String Value to “voicewarmup”

5. Quit the screen; and reboot.

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