It seems that PC Tools firewall was the culprit. Doesn’t surprise me really, I’ve had other problems in the past with programs conlicting with it.

I have now uninstalled PC Tools and upgraded Avast! to version 6.01000 and everything is now working like a dream :slight_smile: I will stick with Windows Firewall for the time being while I ponder other options.

Thanks very much street_lethal and craigb, much appreciated :wink: