Ok, Kaspersky found 9 Trojans in Thunderbird "yahoo/Bulk mail" folder. Kaspersky cannot disinfect as the file is write only. All "Bulk" mail has already been deleted from both my pc and from the server and yet the Trojans remain. I have contacted my Broadband supplier (Sky), who say it is a Yahoo problem (as Yahoo supply the email system for Sky) and Yahoo say it's a Sky problem as they are the one who supplies me the Broadband. My problem is that I cannot gain access to the file for Kaspersky to disinfect and neither Yahoo or Sky is willing to give me advice on how to do it. Anybody know how to go about accessing the Bulk mail folder (I even tried deleting it and it comes up as an error and that it is a Yahoo system file and cannot be deleted ?? HELP 
