Following that, go to the File Block Settings tab and make sure that the Open selected file types in Protected View setting is selected. If so, tick the Open checkbox of PDF Files.

To learn more about these steps, continue reading. Here you need to ensure that the Open selected file types in Protected View option is selected. Then, tick all the Open checkboxes of old Word ...

Whenever you open one of these file attachments or downloads, Word opens in something called Protected View. This is, believe it or not, a feature, even if it comes across an annoyance.

It's so protective, in fact, it can be a bit annoying when you're trying to open Outlook attachments from co-workers. Tech blogger Amit Agarwal explains how to disable Word's "Protected View." ...