How Can I Disable The Open This File Prompt?

I'm running 2012R2, IE 11, Acrobat Reader 11 (Also Chrome, but the same fix should work)

My users open PDF's all day.  I want to remove the Open/Save prompt - it gets in the way and is very annoying.

I've tried creating the registry entry:

HKCU\Software\Microsoft\Windows\Shell\AttachmentExecute\{0002DF01-0000-0000-C000-000000000 046}

AcroExchange.Document.11    REG_NONE

AcroExch.PDF.PDF.1               REG_NONE

AcroPDF.PDF                           REG_NONE

I found these on various forums but none have worked.

Please help.

~Dave