OUtlook 2010 Slow To Open

We have several WIN7 Pro clients in a small office that use Outlook 2010 with Microsoft off-site hosted Exchange mail services.  For the most part all works well.  A couple of weeks ago one user started to experience a problem of Outlook taking 10 minutes plus to open when it is first started after a reboot of the computer.

I did an Outlook repair through Add/Remove programs and also made sure no obsolete/unnecessary add-ins are enabled in Outlook.  The problem persists.  The local OST file is under 10 GB.  

The work around is to kill the Outlook process through the task manager and then on the next start of Outlook it opens fast/normally.  Subsequent Outlook restarts also open normally.  The trigger seems to be rebooting the computer.

The computers are all on a workgroup, not a domain.  No viruses and everything else seems to be running well.  Other computers in the office are not having this problem.  

I suspect it may be the antivirus software interrogating the OST file at first startup.


Thank you.

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Try running it in safe mode and see if the issue still occurs - outlook /safe

If it does then there may be further add-ins causing issues...
Steve BottomsSr Network AdminCommented:
First, dtart outlook in safe mode (outlook /safe).  If it launches fine then some add-on is slowing it down.  Start shutting add-ons off one st a time.

If it still launches slowly in safe mode, delete the mail profile and recreate it; see what happens.  If you still have problems verify the connectivity to your exchange server (testexchangeconnectivity.com is the test site I believe).  

Let us know rhe results of the tests.
eregan99Author Commented:
Thank you for the suggestions Steve.  I will have to try these after normal business hours when the PC is not in production.  Again, it only starts SLOWWWWW the first time out of the gate after a reboot of the computer.
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William FulksSystems Analyst & WebmasterCommented:
You may also want to run a repair on that OST file with scanpst. Anything over 2 gigs is still considered pretty large and can lead to file corruption issues.


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eregan99Author Commented:
I started last night by running scanpst as suggested by Fulks.  It found problems in the OST file and processed repairs.  We are now in wait and see mode to find out if the problem has been resolved.  I want to take it one step at a time before trying other suggestions in order to find a direct cause-effect relationship for the fix.  I will post another update in the next 48 hours.

I think there is merit to the large OST file being problematic (It is actually 12 GB!)  We have other similarly large OST/PST files in the office that are not experiencing this problem however.  Need to archive some stuff.

Thank you.
William FulksSystems Analyst & WebmasterCommented:
Definitely Archive or just delete stuff. Especially large file attachments. You can sort by email size and knock out a lot. Also remember that if you delete stuff it goes into Deleted Items and still takes up space.
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