I've had this for months now and still not got any fix. My problem is that Outlook 2007 also loses any changes to the toolbars etc that I make. I've tried 2 different anti virus programs, I don't have Skype and I've spent ages on google trying to find a fix that works for me. If it's just the shutdown bit there is a piece of software that assists the shutdown. It's Outlook shutdown for Outlook and is an addin. It may help.