Norton blocked my own computer

I received an email from noreply@excelforum.com.  I do have excel and probably am signed up within excel forum's webpage.  The email discussed a Dashboard Competition and gave links, presumably, to its entries.  I wanted to see what a "dashboard" was, and maybe learn some excel tips . . . so I opened a new browser window, searched for excel forum, and clicked on www.excelforum.com.  Immediately I got a Norton pop-up warning that an intrusion attempt had been blocked--from my own computer !?  The text of the warning from its "Details" was:

"Network traffic from getpagehistory.in . . .  matches the signature of a known attack.  The attack was resulted from \DEVICE\HARDDISKVOLUME2\PROGRAM FILES\INTERNET EXPLORER\IEXPLORER.EXE.  To stop being notified for this type of traffic, in the Actions panel, click Stop Notifying Me."

Do I have a virus remotely activated in my computer?  or is Norton trying to stop (and accomplishing stopping) some regular action of Internet Explorer?