Every week the HD’s are scanned, completely including archives (ZIP RAR CAB).
Today I found, sorry Avast! found, 25 occurences of MW97:Marked family in MS OE6 mail boxes. OK, all are moved to the safe, so I can study these catches!
The system is 24 hours online. Updates from Avast! are immediately processed. So, how is it possible that mail with attached DOC with MW97:Marked is slipping into the mailbox? Also it infected the Normal.dot of Word97.
Platform Windows XP pro, OE6.
Dick Stomp, webmaster www.swoteylingen.nl
Welcome to the forums, DickStomp! 
I cannot help you with that. I am sure someone will as soon as they can. But, it is not a good idea to post your email address in a forum … unless you enjoy getting spam or other bad email. 
Please come back often, learn more, and maybe help others.