Office has detected a problem with this file. To help protect your computer this file cannot be opened.

Hi,

If you got this below error on your code,

Office has detected a problem with this file. To help protect your computer this file cannot be opened.

Here you can find the solution to avoid such errors.


Just add this below line when you are initializing excel application.

if you set it to msoFileValidationSkip before the Open statement, it should bypass the file protection check.

excelApp.FileValidation = MsoFileValidationMode.msoFileValidationSkip;