Unfortunately, around the same time I installed it (a few days later), my PC started playing up (blinking screen, shut-downs etc). We thought it was the graphics card, but weren't sure, so we took it into a well-known computer shop and they confirmed it was the graphics card and replaced it (with an ASUS card).
Because my PC was also running very slow now, they looked at that and tweaked it a bit, but said the rest of the performance was down to the Norton 360. They did recommend another 'lighter' product but I thought that might just be sales pitch, so chose to ignore it for the time being (especially as my Norton upgrade had only been in a week or two).
Unfortunately, 3 weeks down the track, not only can I not get my fonts/graphics looking like they used to - the new card, no doubt - but my PC is running like it is on dial-up.
I have tried changing the Norton settings and reading the on-line guides, to no avail.
This morning I tried the on-line help. At the beginning, it gives you the option to run something which will 'check for any problems with the product'. After a short while (30 seconds), my PC hangs every time I try to do this.
I'm considering uninstalling Norton and sending it back under the 60 day warranty.
I'm not that techo myself, but I'd be interested in opinions on whether there is anything I should do first.