I want to read manga on my computer. I heard about mangafox.com and checked it out, but it gave me a virus (which was a pain to get rid of). A friend advised me to find a legal website, so I did some searching around and I found out about jmanga, however I don’t want to get on the website until I know whether for sure it has viruses or not.
In your answer please tell whether you have Norton security or not, because I believe that makes a difference.

yes it does
No, it does not. I have used it on computers with Norton and those without, and there have been no viruses.