My usual policy when Norton or McAfee is preloaded is to take the machine as far from the net as possible, then remove the program, go on the net, and install a free program, Avast is good, but I like AVG better. I have installed the paid for version on my netbook. My main machine has the protection from Virigin my ISP, they say it can be installed on 3 machines, but they must have difficulty counting beyond 1!