Never really considered Norton Internet Security, it's been years since I used it.
I've always liked norton products but back then I wasn't too impressed with their internet security app.
After trying a few products including some of the suggestions above I just ordered the A-Squared suite from EMSI.Pros
It seems to be pretty damn good. In the end I ran two local and 3 online scanners including trend micro on this machine.
A-squared was the only one that picked up the last three which seemed to be causing all the problems.
And once your clean I'd say it's probably almost impossible to get infected/
Updates are very frequentCons
Not sure if this reflects badly on the product but wasn't able to remove one of the infections.
However it linked me to detailed instructions and links on how to remove it. And I must say this things was really dug in all over the machine.
I downloaded the demo for my machine to, I use alot of little utilities and write my own scripts. On my inital scan I had alot of false positives which I had to white list.
However no mainstream apps or anythin the average person would use was detected incorrectly
Norton internet security is real simple. Everything that is searched is color coded.
1. A green check mark is good
2. A yellow ! is questionable
3. A red X means, don't go there
Even the dumbest can understand.