During an SBS Server migration we encountered a strange issue while setting up one of the client laptops.  We were importing their PST files from their POP3 accounts into their new Exchange accounts.  Up until this one system things had been going pretty smoothly.  I then opened Outlook 2007 on this Dell laptop just like I had on the previous 10 systems.

I clicked on the File-->Import and Export link and proceeded to run the wizard to point it at the PST file and kick off the import.  This is where the fun began.  When I got to the Import Personal Folders screen and clicked on the Browse button nothing displayed in the window.  At first I thought I had landed on a folder with no *.PST files in it since the default is to show only PST files.  So I proceeded to try and navigate to the folder I needed and still nothing was being displayed in the file window.  I could see the locations change in the Look In section but nothing was being displayed below.  Stumped I tried numerous variations of search terms in Live Search and Google with no success.  I tried creating a new Outlook profile with no change either.  Finally, I decided to move on (we still had more systems to convert) and opened the users account on another machine and imported it that way so they could function and I could address the issue later after completing the other migrations.

When I returned to the machine later I found that even though I had exited Outlook it was still showing as a running process in Task Manager.  At this point I suspected there might be an add-in issue so I started looking through the various add-ins as well as Add/Remove programs.  In doing so I discovered an add-in called "Outlook Setup Add-In".  Searching on it I found this article at Slipstick (a great resource when it comes to Outlook and Exchange) run by Diane Poremsky, an Outlook MVP.  After reading about this add-in's issues regarding slowness and CPU spiking with Outlook 2007 I decided to disable it.  Once I did, I know longer had any issues with Outlook "hanging" on exit.  It responded a lot quicker as well.  On a whim, I tried the Import/Export wizard one more time and Lo and Behold now all the files were listed as they should have been in the first place.