beaureg wrote:

I have just installed Outlook 2002 on a new computer

On a new computer running WHAT operating system?

Every time I hit the send/receive button, Outlook reloads all the
messages that are on the server, more than 1200 at this time
How do I fix that ?

Did you alter the default behavior for the POP e-mail account defined
within it to enable the "leave messages on server" option?

Tried disabling the e-mail scanning feature in your antivirus software?