On Dec. 8, Microsoft released KB 3114409, a nonsecurity update that was designed to help admins keep Outlook 2010 in safe mode. Within hours, Microsoft’s forums were flooded with complaints that on some machines, KB 3114409 forced Outlook 2010 to only start in safe mode.
It took Microsoft about 12 hours to pull the patch. The only advice? Golly, if Outlook 2010 starts in safe mode, you need to uninstall KB 3114409.