Change the setting in Excel to allow it to open the files in normal mode for all files originated from Internet.
a) Go to File->options.
b) Go to Trust center ->Trust Center Settings.
c) Go to Protected view.
d) Uncheck the Settings “Enable Protected view for Files Originating from internet”.
Another option is to choose Save instead of open. Then save it to the desktop then open it. This means that Excel is opening it from a local Computer and not the internet.