I recently stopped using Norton 2005 (after using it for 5 years ), I got sick of it's resource hogging and the bloat of the program.
I also had the same situation as you where Norton didn't find viruses and Housecall did.
Free online anti-virus scanners.
http://www.bitdefender.com/scan/licence.php
http://housecall.antivirus.com/house...tart_frame.asp
http://www.pandasoftware.com/actives..._principal.htm