Roady (and any others):

I just started experiencing a very similar problem.  I am running
Outlook 2007 with Vista.  Have had it for over a year.  (BTW, I'm very
technical.  Honestly.)

I was all non-exchange until July 2007.  Added an Exchange server and
mailbox.  I left the exchange server in January.  Still have the post
office and the exchange connection.  I only left it around so I could
get to the email.  All was fine.

I also had the Salesforce plug-in for Outlook.  It's been active but I
have not been using it.  I planned to start using it again soon with a
new Salesforce account.

All was fine till March 27th.  I had a problem with web browser
connections (Outlook was able to connect fine though.)  I took the
opportunity to do a backup of my important items (docs, pics, mail).
After the restart Outlook will eventually take up about 52% of CPU
(not hogging one of 2 cores, just taking about 52%).

I saw a brief message from Outlook saying something about Salesforce
and it is no longer starting the salesforce add-in.  But still is only
quasi-responsive.  It will let me shut it down from the task-manager,
and task-manager reports it as 'running'.  Before it gets up to 52% it
is more responsive (I can switch to Outlook task).  After it hits 52%
point, I can't switch to it with the task manager, taskbar, or alt-
tab.  It will not draw itself on the screen.  Cursor will not appear
when over Outlook app on screen.

Nothing I have done so far will make Outlook responsive.  I let it run
overnight.  Came back to see 52% CPU and still unresponsive.  Restart
machine.  Restart Outlook.

On restart of Outlook it acts properly at first but then goes out to
lunch.  It prompts me to login to the old Exchange server but I
normally just cancel that and have a different mailbox as my primary.
This is the only part of Outlook that is responsive.  If I give it a
password (just to see what will happen) Outlook pops to 98% of CPU
until it finishes attempting to login then returns to 52% and asks for
new credentials.  Credentials pop-up dialog is fully responsive, but
Outlook is not.

HELP!

I saw another post from a similar user who seems to use BCM.  I have
BCM (bundled install) and I've played with it a bit, but I don't
really use it, though it is present.

On one shutdown Outlook recognized that I had messages in the outbox,
displayed the dialog (do you really want to exit) but then would not
respond to my click.  I had to kill it again.

Restarting Outlook means killing it in the Task Manager.