Man, as wondering Why said, Norton is a FULL PIECE OF SOFTWARE **** that is useless, try switching to free and reliable products like mine (AVG A-V, Windows Defender and Comodo Firewall), believe me, if someone asks me dor an advice on what sec. products to use, i will definitively tell them to use those apps. (Not so much RAM comsuption, and inmediat detection of viruses, malwares, and/or app leaks).
And for the problem you have, i think it must be something tracking your downloads based upon any Java leak, try uninstalling Java AND Lw, then scan your system for viruses and malware, and reinstall them both, (i recomend you upgrade your Java version to 1.06), and see what you can catch.