excel runtime error R6034 excel.exe attempted to load c runtime error incorrectly

I bought a computer from HP with Microsoft office 2007. Then I bought from Microsoft a copy of Microsoft 2010 office home and business.

It worked fine until; a hardware problem required a wipe out of data and reinstall. 

Now office installs with the code I have, word and outlook work but Excel gives an error message "Program..............\excel.exe   R6034 error

attempt was made to load the C runtime library incorrectly

Question Info

Last updated January 17, 2019 Views 4,294 Applies to:

Method: 1

Try to open the file in Excel safe.

Click Start> Type ‘excel /safe’ without quotes in search program and files and hit enter.

Note: There is a space between the word ‘excel’ and forward slash.

If Excel works as expected, disable the addins using the link below and empty the Excel startup folder by browsing to the location mentioned below:


Browse to the below locations and remove the files from the startup folder:

C:\Program Files\Microsoft Office\Office14\XLSTART

C:\Users\User Name\AppData\Roaming\Microsoft\Excel\XLSTART

Note: Take a backup of files before deleting the files.



Run a Repair of Office...if it fails or does not work,

Completely uninstall Office and all Office enrties found in the Control Panel. Reboot, make sure Windows is completely updated. Reinstall Office and apply all updates as needed. Reboot.

Here are links for steps & helpful info:




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