A. I've seen a number of users with this problem, and there are several approaches to resolve it.

First, try starting Outlook 2010 with administrator privileges. In the start menu, navigate to the Startup folder and right-click the Outlook 2010 shortcut. Click Properties then, in the Compatibility tab, check Run this program as an administrator in the Privilege Level section.

In cases where this didn't work, the solution that worked for me was to recreate my Outlook profile. This means you'll have to set up the mail accounts again, and any cache contents will download again.

  1. Close Outlook 2010.
  2. Start the Registry Editor (Start, Run, Regedit.exe).
  3. Move to HKEY_CURRENT_USER\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem.
  4. Delete the Profiles key.
  5. Restart Outlook 2010 and reconnect to the email accounts.

If after reconnecting to the accounts, Outlook 2010 starts to hang again perform the above process again, but this time only connect to one Exchange service and see if Outlook 2010 still hangs. I found a particular Exchange Server (it was running Exchange 2010) caused my problem, and by not connecting to that server, Outlook 2010 was hang free. Remember that Outlook 2010 is currently in beta, so this problem will probably be resolved in future builds.

Related Reading:

Check out hundreds more useful Q&As like this in John Savill's FAQ for Windows. Also, watch instructional videos made by John at ITTV.net.