2863 Views 1 Reply Latest reply: Mar 12, 2011 2:09 AM by Matt Clifton
Are you running Norton Security? Looks like a notification that it detected and blocked a portscan from the outside world. You probably could have clicked on "Learn more about this attack" to ... learn more.
A portscan is a detection method to see what network vulnerabilities you have. Think of it like a burglar trying the doors and windows. Generally this only tends to be a problem if you have a computer hooked directly into the internet and don't have a firewall or other protection. Adding a wired or wireless router between your computer and your modem can help protect against incursions.
If you're not running Norton, and it just appeared while you were browsing, it's a spam popup designed to scare Windows users into downloading malware, and you can just close the window and ignore it.