+1 for ditching Norton. I use MSIE which is free and works. I also use Defraggler every week and CCleaner almost daily: oh, and Chrome rather than IE.
I've not seen Advanced System Care before, Swee'pea99 - do you rate it better than CCleaner?
CCleaner seemed ok to me, but I got the impressions it was kind of resting on its laurels, whereas ASC seems to be very 'active'...regularly updated, which I take as a good sign. Maybe CCleaner's good - I couldn't say, since I haven't used it for a long time - but certainly I think ASC is excellent...I install it on friends/relatives computers as a matter of course, and they all seem very pleased with it. (Incidentally, I wouldn't bother 'upgrading' to the paid for version - I did, once, and it was nothing but trouble!)