I'm a happy owner of a free version of the Office 365 suite, but no programs are working. When I run any program, no matter which one, I'm always getting a messge saying that an unknows error occurred and the app needs to be closed. What can I do in that situation?
In that case, I recommend removing the whole suite and use one of Microsoft's fixes for removing remaining files before restarting the PC. Then, after a successfull installation, everything should work just fine. https://support.office.com/en-us/article/Uninstall-Office-2016-Office-2013-or-Office-365-from-a-PC-9dd49b83-264a-477a-8fcc-2fdf5dbf61d8?ui=en-US&rs=en-US&ad=US