Hello,
Would you be able to clarify what you ran the repair on?
Were having the exact same issue, and it has started just recently.
I've reinstalled Adobe Reader, and checked that the default application was Outlook.
The user experiencing the issue is using the latest version of Adobe Reader DC, Windows 10, and Outlook 2010.
Thank you!
Glad you got it working. I used the:
Open Task manager, kill all services/applications related to adobe and MS Office
Open "Programs & Features" (Run: appwiz.cpl)
Select Micosoft Offic - click change, then Repair
Don't reboot
Select Adobe Acrobat, Change, Repair
Reboot