If net protect works on your PC, then all well and good. I once had the full mcafee on a desktop and it struggled with windows XP and insufficient ram. The old site adviser was reliable, but sometimes failed after updates, and was usually fixed by a reinstall. Probably better on the newer version. Forget the power consumption - perhaps a few 10s of watts for a few minutes. Perhaps someone was referring to processor power, I.e. capacity.