After the installation, all my documents, workbooks and presentations are showing up in the Windows File Explorer as unknown file types. “I’ve just installed a new version of Office 365 in my system but it’s clearly not defined as the default program for viewing and edition my Office files. Here’s a question we received from one of our readers:
Applicable to the following Office versions: 2019, 2016, 2013, 365 on Windows 7, 8 and Windows 10.
