So what then? I have cleaned out numerous PC's that were infected, using all said tools and then some. After numerous reboots and checks to make sure the system was clean (including registry cleaning), I still receive the occasional call in 2 weeks saying "It's Baaack!" Why is this so? Could it be the hackers know the users public IP and will continue to use it for hacking? Are there remnants of malware still resident in the system that re-infect that I am missing? Is a reformat the only answer? Maybe it's the surfing habits of the user and the sites he goes to? Why does this happen all over again after no malware activity for a few weeks or so? I would love to hear some comments on why this seems to happen on occasion....