need home computer help

Does it only do that one some websites but not others? Possibly the website you are visiting when it does that is a security risk.

Norton has not done really well w/ the anti-virus tests and causes some hardware/software conflicts, so I haven't ran it for a few years.

Update norton w/ the latest definitions. That shield may be telling you that your anti-virus definitions are out of date and need to be updated; they aren't something you get once a month or something, they need to be updated daily when it comes down to it.

Good Luck

Disable Norton, go back into Windows Security Alerts (I believe that's what the shield icon is, unless you have another program with a similar one), and try to update definitions and set the firewall, etc. All that stuff. When done you can set Norton back to normal.