>>What version of Office and Windows? ..and what are you using for anti-virus???
>
>This is Windows 8.1.
>
>The product information is attached.
>
>I use McAfee.

I would try to use the Windows Update and see if that works. There is a way to make the Windows Update feature update office as well...
https://support.office.com/en-us/article/Update-Office-and-your-computer-with-Microsoft-Update-2ab296f3-7f03-43a2-8e50-46de917611c5


This is for Office 2013 but it's pretty much the same in 2016 - might give this a shot...
https://support.microsoft.com/en-us/kb/2753538

..if none of those work - then I'd try disabling McAfee and trying.