I have Norton 360 Premium for 10 PCs. I bought AntiTrack, hoping it would cover all 10 PCs. The confirmation e-mail says "You must download and Install Norton AntiTrack on each device you want protected." They conveniently neglect to mention that you have to pay separately for each one. Norton™ 360 Premium costs me $ 124.99 / year. Adding AntiTrack to all 10 computers would cost me $399.90 / year. Why? Is AntiTrack so much more valuable as to be worth 3 times the value of Norton 360?