I have been running Outlook 2010 since it first came out and for the most part I've been pretty happy with it.  Since I first started using it, though, I have had an issue with it.  Apparently out of the blue it would sometimes crash (usually right in the middle of writing an important email) forcing Outlook to restart. 

I spent some time researching this, and it appears that the crashes are most often caused by Outlook Add-Ins.  After looking at Event Viewer, that is the next place I would look.

Go to File -> Options.  That will bring up the Outlook Options window.  Click on Add-Ins in the lower left-hand menu.  That will list all the Add-ins that you have installed with Outlook. 

The next step I would recommend is removing all of the Add-ins and then start adding them back one by one over time to narrow down what is causing the issue.  To disable one or more Add-ins, at the bottom of the Outlook Options window on the Add-in Options page select 'COM Add-ins' beside Manage: and click the Go... button.  That will bring up the COM Add-Ins window where you can uncheck Add-ins that you want to disable.

In my case the 'Send to Bluetooth' Add-in was causing the issue.  once I disabled that I haven't had Outlook crash on me yet.

I hope this helps if you are experiencing the same issue that I was having.