If you have the Sophos Outlook Add-in 1.3.0 installed, and you close Outlook suddenly -i.e. before it is fully launched, you may see the following dialog box:
Outlook experienced a serious problem with the 'sophos outlook add-in' add-in. This add-in is incompatible with Data Execution Prevention mode and should be disabled or upgraded to the latest version. Do you wish to disable this add-in from loading?.
First seen in
Sophos Outlook Add-in
This message appears because the underlying .NET Framework code did not have a chance to completely load. This will not impact the Sophos Outlook Add-in the next time it is launched along with Outlook, but the error message can be misleading.
What To Do
If you see this, select No.