I have purchased the security centre online, but when i go to download it, i get virus installation wizard" box that says "an error occured while downloading the installation package fo mcafee virus scan. Such errors often occur due to system errors". i uninstalled my out of date mcafee, and am now unprotected, only have the windows firewall. i have contacted mcafee and tbh their help has proved fruitless. i have windows xp sp2. if anyone could offer some advise i would be very grateful