How to turn off UAT nag on DEV machines

Run “msconfig”, go to “Tools” and launch “Change UAT Settings”. set to never notify

Turn off warning on file open Run gpedit.msc” go to User Configuration”, “Administrative Templates”, “Windows Components”, “Attachment Manager”, Double click  “Inclusing list for low file types” and enable and  add “.exe;” to the list.

For more info, see

Article from here