Technology Insights

Outlook 2010 Add-In Error: Add-In Was Disabled By The User After A Data Execution Prevention Failure

I use an Outlook 2010 add-in called Bettasoft Mail Alert to display a mail icon in the task bar when new mail arrives. A couple of days ago the add-in caused an error and Outlook disabled it. I initially thought I could just go into the Options and put a check back into the add-in checkbox however that did not work. After more investigation I figured out that you have to enable the add-in in the Disabled Add-Ins window first and the put a check in the add-in check box for the disabled add-in to work again. Below I describe the error in more detail and the steps taken to resolve the error.