Just a quick post, had a incident today with a user where Outlook 2013 crashed every time they attempted to send an email.
It turned out that this was caused by the ESET NOD32 installation on the machine. Disabling the email integration in NOD32 immediately fixes the problem.
To disable the email integration right click on the NOD32 icon in the notification area to bring up the options screen. Open out the “Web and email” section and then “Email client integration” and then untick the option “Integrate into Microsoft Outlook”
A quick and easy fix to a pain in the arse problem. 😀