Andy, forgot to say I have Zonealarm firewall and it does not seem to be affected in any way. I am impressed with AVG (at the moment). It has done the job and got rid of about 10 viruses lurking in my machine. Garry MODEL ENGINEERING DISCUSSION LIST. To UNSUBSCRIBE from this list, send a blank email to, modeleng-request@xxxxxxxxxxxxx with the word "unsubscribe" in the subject line.