Today I was unable to attach a Word file to an email I wanted to send. I first tried through my Yahoo mail account. I didn't get an error message, the computer screen just got paler while the circular working icon was going. After waiting, I closed the program. After repeated attempts, I restarted my computer and had the same problem. I tried sending the Word file from my Gmail account and got the same problem.
The problem seems to be with just Word, as I had no problem attaching a PDF file.
I haven't made any recent changes and don't have any 3rd party virus protection. I tried the Microsoft trouble shooter with no result.
I have Windows 10 Home and use Chrome as my browser. I've had this configuration on my computer for over 2 years without a problem.