This problem is driving me nuts! I was having issues with Outlook 2013 months ago and ran the compatibility troubleshooter, which turned on the "Run as administrator" flag on OUTLOOK.EXE. Here's my problem - under Windows 8.1 *NONE* of the Office 2013 executables have a "Compatibility" tab when you right-click and choose "Properties" so now I can't modify this behavior. How can I turn off "Run as administrator" for Outlook 2013? The troubleshooter doesn't give me the ability to do this, and running Outlook in this mode turns off email search indexing and the ability to drag-and-drop file attachments in messages. Argh!