run the Norton removal tool,
http://service1.symantec.com/SUPPORT/tsgeninfo.nsf/docid/2007080716174339?Open&docid=2005033108162039&nsf=tsgeninfo.nsf&view=docidEven thought you may not have or ever had Norton Security suite installed on the system, This tool will reset you IP stack and winsock, This tool usually fixes most browser issues when a browser hijack has occured.