You didnt post any information to work with.
What exactly is the error message?
What is logged to the Event Viewer?
What add-ins are you using?
Does it work in Outlook safe mode?

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Robert Sparnaaij [MVP-Outlook]
Coauthor, Configuring Microsoft Outlook 2003
http://www.howto-outlook.com/
Outlook FAQ, HowTo, Downloads, Add-Ins and more

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"LB" wrote in message
...
I installed the 2007 Beta but had to unstall after a few days because
Outlook
continually crashed whilst I was in the middle of doing things, e.g. either
opening mails or attachments.
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LB