Lately I have an intruder on my computer that inserts the text " ****SPAM**** " into the subject field of all incoming email. It does it for all good emails.
This behaviour micks the work of some antispam software but in fact this is done without my wish and without having any anti virus software what so ever. I just have ZA Pro. That is all.
I wonder if anybody has any idea what is doing that.

Operating System:Windows XP Pro
Software Version:
Product Name:ZoneAlarm Pro