Receiving duplicate/triplicate emails

[Susan]

Help!! I have 2 computers at one location that both use
Yahoo Mail & Outlook 2000. One computer is fine -- the
other just started receiving duplicate then triplicate
emails (it occurs for each email). There were no changes
made to the settings on Outlook or Yahoo. When I go into
Yahoo the duplicate/triplicates are not shown there --
only in Outlook.

I ran a virus scan of the computer & no viruses were
found.

Any ideas? thanks.