Using Outlook 2016, Windows 10. In the last few days, I've started getting multiple copies of the same email. Not all emails, but most. Some, just two or three. Others, up to a dozen of the same...

I have two desktop computers. A new one that came with Windows 10 installed. The other was Windows 7 until I did the upgrade. I tried to install CorelDraw X3 (yeah, it's really old...) on the new...