A free trial of the new Zone Labs Security Scanner found Atdmt-3rd Party Cookie on my Compaq Presario Pentium 3 / 850 MHz, 40.0 GB hard Drive, 128 MB Memory. I know almost nothing about computers, and would like to get rid of this virus/trojan horse/spyware or whatever it is without having to purchase even more security software. Ad-aware, EasyCleaner, Norton, and ZoneAlarm, seem quite enough. Except for Atdmt-3rd Party Cookie. Any help in deleting the thing is certainly appreciated.