When new norton antivirus is installed what happens to old one like if i install 2008 what will happ

Hello ,

Nice choice of product . The older versions are completely removed/erased/uninstalled . This uninstall will be performed when installing the new versions . A pop up may appear and alert the user of this uninstall . Always accept the uninstall . Be sure to run a "Full System Scan" after the install is complete .