NIS and new install of Outlook 2010 causes Appt Aux Flags folders created

I just upgraded to Office 2010 and now every time I start Outlook, I get a long pause at the startup screen as it's loading the Norton Anti-Spam add-on.

 

When it opens, it has created a new folder in every mailbox. The folders are called

Appt Aux Flags

Appt Aux Flags1

Appt Aux Flags2

Appt Aux Flags3

 

Every time I open outlook a new one is created and this is in every mailbox. There is nothing in these folders.

 

Now when I go into outlook and disable the Norton add-in this stops happening.

 

Please tell me how to fix this.

 

Thanks