I have always hated unistalling and reinstalling antivirus and firewall programs especially norton. Even after an uninstall, norton will leave behind a whole bunch of junk. If you have the time and the patience i definitely would recommend yout o reinstall the OS and then install the new antivirus software. It wont just help with Norton's junk but it'll be a completely clean install and ur system will feel better. Thats what i do once a year, reinstall the OS and grab the latest version of the software.
AMD Athlon 64 3500+ [939 Socket] W/ ASUS \"A8N-SLI Deluxe\" nForce4 SLI Chipset PCIe Motherboard
Kingston 1024 MB [512MB X2] DDR-400 PC3200 Memory
MSI Nvidia GeForce 6600GT 128MB DDR3 128-bit PCIe
Western Digital 160 GB 7200 RPM 8MB Cache SATA Hard Drive + WD 120GB 7200 RPM IDE HDD
LG Dual Format/Double Layer 16X DVD±R/±RW + CD-R/RW Drive