If you see "Error 1935. An error occurred during the installation of assembly component" when you install Office 2010 or 2007 or one of the Office stand-alone products like Excel, restart the computer and try to run setup again as a quick first step.
If the error still appears after restarting the computer, try these other methods to fix the problem:
Run the System Update Readiness tool
IMPORTANT The System Update Readiness tool can only be used on Windows 7 or Windows Vista operating systems. If you have Windows XP, try one of the other methods in this article.
Select and download the System Update Readiness tool for your version of Windows:
When prompted, click Open, and then click Extract Now. Extract the files to the folder you created.
Find cleanup_tool.exe in the folder you created and double-click it.
In the "Do you want to run the .NET Framework Setup Cleanup Utility?" message, click Yes.
Click Yes to accept the license agreement.
In the Product to cleanup window, choose a .NET Framework version that you want to remove.
Note You can't remove .NET Framework versions that are part of the Windows operating system. If you have Windows 7, you can't remove .NET Framework versions 3.5 or lower. If you have Windows Vista, you can't remove .NET Framework versions 3.0 or lower. If you have Windows XP, you can't remove .NET Framework versions 2.0 or lower.
Click Cleanup Now.
Restart the computer once the .NET Framework component is removed.
Download and install the following components, one at a time, based on your operating system:
You may experience error 1935 when you install Office 2010 Service Pack 2 (SP2). As Office 2010 includes .NET Programmability Support, this issue may be caused by the interference between Windows Installer (msiexec.exe) and Windows Search (SearchIndexer.exe) or another module in the assembly file copy process. This issue may also occur when you apply other updates, for example, a hotfix for Microsoft .NET Framework components. To work around this issue, use one of the following steps:
Method 1: Retry installation of Office 2010 SP2
Method 2: Stop Windows Search Service, and apply Office 2010 SP2
To stop Windows Search Service, follow these steps:
Click Start, type services.msc in the Search programs and files text box, and then click services.msc in the search results.
In the list of services, right-click Windows Search, and then click Stop.
Method 3: Perform a clean startup, and apply Office 2010 SP2
Method 4: Install all available updates by using Microsoft Update and apply Office 2010 SP2