A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
I have been getting the same "file is corrupted" message, and none of the information here helped.
I was looking around and found something that worked without a bunch of weird steps.
Right click on the file, and click on properties.
at the bottom of the General tab. There is a security notice.
"This file came from another computer and might be blocked to help protect this computer."
Click the Unblock button, then click apply.
File now opens without an error.
Hope this helps some of you.