Hi !
Thanks for the quick answer !

You are definitively right, but I had no choice. My workstation is a Win2000 Server (sp4), I can don nothing about it :'(.

2. to do what you want, start avast in the Enhanced User Interface, go to the Tasks folder, edit the Resident Protection task (choose it's Properties) and for each provider you want (Outlook/Exchange, Internet Mail), go to the Virus tab, remove the verb 'Interactive selection' and instead select something like Move2Chest, or Delete. Hope this helps,
It does help ! Thanks ! The enhanced interface is indeed really powerfull ! I chose "repair" if failed "delete" if failed "choose action", that should do the trick 8) Thanks again !