Several factors can delay Outlook’s start time. To troubleshoot this problem, begin by starting Outlook in Safe mode. Go to Start, Run, then type
outlook /safe
If Outlook starts quickly in Safe mode, the problem is most likely one of the following:
* The outcmd.dat file in the application datamicrosoftoutlook folder is corrupt. Rename or delete this file while Outlook is closed. When you restart Outlook, the folder will be recreated.
* The view is corrupt. Start Outlook from the command prompt by typing
outlook /cleanview
to fix this problem.
* A message in the Inbox is corrupt. Start Outlook in Safe mode, then move the Inbox messages to another folder. Be aware that you will lose your mailbox contents.
* An Outlook add-in is causing the problem. Open the Tools menu; select Options, Other, Advanced Options; click COM Add-Ins; click Add-In Manager; then clear all add-in check boxes.
If Outlook doesn’t start quickly in Safe mode, you can also try to disable Windows Messenger integration. To do so, open the Tools menu; select Options, Other; then clear the “Enable Instant Messaging in Microsoft Outlook” check box.